Harley 103 Stage 4 Vs 110The factory horsepower rating of the Harley 103 engine is about 64hp, and it is measured at about 5000 RPM. B What is a Harley Flhtp? Description. This Street Performance kit produces 103 hp and 110 ft-lbs of torque. The Milwaukee-Eight 107 accelerates 11 percent quicker 0-60 mph and 11 percent quicker 60-80 mph in top gear than the Twin Cam High Output 103. If you use the HD 110 kit with head work and a 235 degree mild cam at 10. it can be made to run much better, compression, the right cams, (don't get all hung up on. 110: What to choose? There are ways to improve the performance of the 103, but the 110 has a lot of good features (I think). That said, I went 103 on my 07 Softail. I definitely plan on owning it in 5 years if not 10 years, or forever. " At any rate I don't think you are going to get the power you are looking for without voiding your warranty. Regardless, Harley 110 stage 4 makes your ride even better. Here we bring the best options based on different Harley engines. And while a 110 will give you 17 more cubic inches, the stock heads are going to limit the returns. Performance Packages">Performance Packages. What are the 4 Stages for Harley-Davidson? Stage 1: Intake, exhaust, and ECM remapping Stage 2: Cam upgrade with adjustable pushrods Stage 3: Big bore cylinders, matching pistons, and cam upgrade Stage 4: Stage 3 + Upgraded heads, clutch components, throttle body, and lifters How much is a Screamin' Eagle upgrade?. The 110 isn't anything to brag about, just like every other Harley engine. getting into the 110+ isnt a big deal,but gets into some issues that. 175 138K views 9 years ago Harley-Davidson Screamin' Eagle 103 ci Street Performance Stage 4 Kit pn #92500011 http://smokinharley. That's not the point I was trying to make. Fierce performing camshaft for an array of engine sizes, large displacement 103", 110" and 124" engines looking for a superior torque band with excellent horsepower gains in heavy bikes (2200 - 6250 rpm) Smaller high-revving displacement 95" style engines in lighter bikes looking to twist the throttle and tap into some horsepower (2500 - 6800 rpm). Engine power will be reduced and you risk piston damage. Stage IV same EXCEPT substitutes a 260 cam and INCLUDES SE Pro 110+ heads. If the Harley 103 engine is modified using the stage 1 kit. 100/100 is super easy on a 103"er,105/110 is also very easy and still be a VERY reliable & ride. The 103 has a displacement of 1,690cc, while the 110 has a much larger displacement of 1,823cc. Below you will find an assortment of sample dyno charts for various Harley combinations. This stage IV comes with 110+heads ,260 cams ,58mm throttle body, injectors it realy moves but low end below 3000 rpms is alittle sluggish but once you get going all I can say is hang on. 100/100 is super easy on a 103"er,105/110 is also very easy and still be a VERY reliable & ride. Our Screaming' Eagle 110 stage 1 come with a multi angle intake and radius super stock valve job, intake & exhaust bowl blending and are milled. Stage 3 Performance Package Designed as an economic option when building a 107, 110, 113, 117, or 120” engine. The Stage IV seems to come on like gangbusters but only after about 4000rpms. These stages are: Stage I (Air flow - intake, exhaust, ECM) Stage II (Cam - torque or horsepower) Stage III (bore and compression increase comes with cam) Stage IV (New heads, throttle. SE Stage III or Stage IV??. Get a look at a detailed comparison of the new Milwaukee-Eight engine VS the old Twin Cam both built up to their max capabilities with Genuine Scr Show more. ago A tune and "right modifications" 103 will beat a stock 110 yes. ago I definitely plan on owning it in 5 years if not 10 years, or forever. When I got my 103, the 110 was a lot more expensive an the 120 was retarded expensive. Our Screaming' Eagle 110 stage 1 come with a multi angle intake and radius super stock valve job, intake & exhaust bowl blending and are milled. Harley-Davidson Screamin' Eagle 103 ci Street Performance Stage 4 Kit pn #92500011 http://smokinharley. Get a look at a detailed comparison of the new Milwaukee-Eight engine VS the old Twin Cam both built up to their max capabilities with Genuine Screamin' Eagl. A 110 can be plenty reliable. Best Cam for 96 Cubic Inch Harley – Feuling Reaper. The stage 4 kit is claimed to produce 103 hp and around 110 ft-lbs of torque with new ported heads, throttle body, 259 cams and SE clutch kit on the CA Street Legal version. Since I got my 2015RGS earlier this year I have been craving some more power. Bore Stock jugs to 107" go with the Fuel Moto Package which has woods 555 cams, Woods lifters, Wiseco Pistons, and heads done by bean. Bore Stock Jugs to 103", SE Pistons, Andrews or SE CAM for down low Torque, Heads done by Bean. As far as your first post, just so you know the trq numbers from hd are to the crank, your 96 is about 62-3 hp and 80 trq to the rear wheel, a good stg. Stage V Tire Shredder kit installed and out the door for $2930. It has a greater valve design than Stage 3. These stages are: Stage I (Air flow - intake, exhaust, ECM) Stage II (Cam - torque or horsepower) Stage III (bore and compression increase comes with cam) Stage IV (New heads, throttle. Stage V Tire Shredder Kit: Should I do it. The potential to make power is greater with the M8 vs the 110. Quick answer, the 103 has 203 cams along with bigger cyl. This stage IV comes with 110+heads ,260 cams ,58mm throttle body, injectors it realy moves but low end below 3000 rpms is alittle sluggish. Check out the specks on the sheet. The new Screamin' Eagle Street Performance Stage 4 Kit - 103 Cubic Inches (P/N 92500011, $1,849. I'm bout to put 4 or 5 grand into this bitch. The Stage IV is the best deal, no doubtthe difference between the two is $492. The Milwaukee-Eight 114 accelerates 8 percent quicker 0-60 and 12 percent quicker 60-80 than the Twin Cam 110. Naturally if you tune the 110 it will always be more powerful than a 103 but it also weighs more. Improved Economy: Efficiency gained in Milwaukee-Eight air flow and combustion, including. Has anyone done this to their bike? Would love some feed back on the performance. The 103 has a displacement of 1,690cc, while the 110 has a much larger displacement of 1,823cc. What are the 4 Stages for Harley-Davidson? Stage 1: Intake, exhaust, and ECM remapping Stage 2: Cam upgrade with adjustable pushrods Stage 3: Big bore cylinders, matching pistons, and cam upgrade Stage 4: Stage 3 + Upgraded heads, clutch components, throttle body, and lifters How much is a Screamin’ Eagle upgrade?. 103 cubic inch Harley?">How much horsepower is a stock 103 cubic inch Harley?. it can be made to run much better, compression, the right cams, (don't get all hung up on torque cams you have a 110, it has plenty of torque) great exhaust and a good air filter, with a Seprt, or PCV, and do not even ride past a Harley dealer with the intent of making …. Another thing to consider is price. 375"; same as 96"/103" motors. Runner Up (for 88, 96, 103) – Feuling 525 or S&S Cycle 583. There has been some problems with cases cracking after being bored. This Street Performance kit produces 103 hp and 110 ft-lbs of torque. Best Cam Overall (Great for 96, 103, 110) – Andrews 57H or Feuling Reaper 574. The Harley Davidson 103 engine has 75 horsepower with 90 ft to 100 ft torque. com 336-722-3106 103 to 110 Engine Build Wilkins. Harley 110 – has 83 horsepower and 90 ft torque at 3,750 RPM. Best Cam Overall (Great for 96, 103, 110) – Andrews 57H or Feuling Reaper 574. Note the data in these charts is relative to each specific bike & conditions and is to be used for reference only. the benefit of the limited it just all the frills that come with the bike to. you can find this kit in the screaming eagle race catalog J JT07WG Registered. We have several of these 110 drop ins running around here. I considered the Stage IV but it's an extra $1K and I could not justify spending that much more for the extra 10 HP at 6200 RPM. When I got my 103, the 110 was a lot more expensive an the 120 was retarded expensive. Whats the difference between the 103 and 103 high output? Harley reports that the Twin Cooled 103 has 10. ago A tune and "right modifications" 103 will beat a. This means that the 110 will have more power and torque than the 103. 103 to 110, is there a downside?.110: Head to Head Comparison. And while a 110 will give you 17 more cubic inches, the stock heads are going to limit the returns. The stage 4 kit is claimed to produce 103 hp and around 110 ft-lbs of torque with new ported heads, throttle body, 259 cams and SE clutch kit on the CA Street Legal. A short Video Clip showing the Difference in power between Two Harley Davidsons 103 vs 110 engine (Both are Stage One) Show more Show more 16:30 103 to 110 Engine Build Wilkins. This is a list of verified horsepower figures for a variety of the Twin Cam 88 and 95 CID Engines. The standard bore for the 110" motor is 4"; 4. Not really interested in a racer, but saying there is never enough power! CVO 110s will outperform stock (96 big bores) 103s. Discussion Starter · Oct 16, 2015. my suggestions: set compresion @ 10. A 4 valve head will flow more air and a Harley motor, hell any motor, is just an air pump. Harley Cam Comparison Chart Harley engine components control how much air and fuel your engine can take in at a given time. Get a look at a detailed comparison of the new Milwaukee-Eight engine VS the old Twin Cam both built up to their max capabilities with Genuine Screamin' Eagl. If the Harley 103 engine is modified using the stage 1 kit. The new Screamin’ Eagle Street Performance Stage 4 Kit – 103 Cubic Inches (P/N 92500011, $1,849. Our Screaming' Eagle 110 stage 1 come with a multi angle intake and radius super stock valve job, intake & exhaust bowl blending and are milled. Zipper's Muscle 110" Kit for 2008. Note the data in these charts is relative to each specific bike & conditions and is to be. The 110 isn't anything to brag about, just like every other Harley engine. Read More Harley 103 Stage 4 vs. com 336-722-3106 103 to 110 Engine Build Wilkins Harley-Davidson. There has been some problems with cases cracking after being bored simply due to the lack of material left between the cylinders. The Bolt-In 110 Stage V Tire Shredder kit comes complete with Screamin’ Eagle 4-inch big-bore cylinders, CNC-ported cylinder heads, matching 10. 5 to 1 compression pistons, Perfect-Fit pushrods, SE. With the 103 with stage IV using the SE 259e cams if you have the bike loaded you will find you will be revving the motor a little so she doesn't buck when getting her rolling. A short Video Clip showing the Difference in power between Two Harley Davidsons 103 vs 110 engine (Both are Stage One) Show more Show more 16:30 103 to 110 Engine Build Wilkins. 110" Power Package for HD® Twin Cam 96™, 103™ ….Stage 4 VS Twin Cam 110 Stage 4 │Harley ">Milwaukee. With this power, you can run on big highways since it’s the power of big bikes. A tune and "right modifications" 103 will beat a stock 110 yes. 900” and a redesigned intake port for using the inexpensive SE 58mm throttle body. The more air you can flow, the more fuel you can add, the more fuel you add, the more power you make. This Street Performance kit produces 103 hp and 110 ft-lbs of torque. IMO the Stage III seems better suited to my riding style and SEEMS to offer more grunt at LOWER rpms than does the Stage IV kit. 103" or 107" Upgrade is there much difference?. Stage III results in approximately 100 lb. Where the stock 110 engine levels out at just over 4,200 RPM, the Muscle 110″ kit kicks into overdrive and raises horsepower by 45%! Peak horsepower climbs from the mid-80’s to the high-120’s with torque over 100 ft/lbs from 2,500 through 6,500 RPM, breaking the 120 ft/lb barrier along the way. I'm considering going to the Screamin' Eagle 103 Stage III or IV kit listed in the H-D catalog. Bump the early Twin Cam from late from 96ci or 103ci to 110ci as well as. With the 103 with stage IV using the SE 259e cams if you have the bike loaded you will find you will be revving the motor a little so she doesn't buck when getting her rolling. Top 7 Harley 103 Engine Performance Upgrades To Get More …. When you ride your motorcycle on lower RPMs, which is the common practice, the HP falls between 45 and 55 Horsepower. I am a mvp at local dealership it only cost me 3300. I'm bout to put 4 or 5 grand into this bitch. This Street Performance kit provides the maximum horsepower output for a legal 103 kit that will maintain the factory warranty. In both the 110" and 117" kit, the hi strength steel liners are the "trick" that allows a bigger bore to fit in the case bore where previously a case bore would be required to accommodate the larger cylinder bore. Just saying if you plan on owning it in 5, 10, 15 years and you need to do a top end, expect to be buying cylinders again with that piston set. Harley 110 – has 83 horsepower and 90 ft torque at 3,750 RPM. Harley- Davidson Twin Cam 88, 95, 96, 103 and 110 CID engines Horsepower Gallery Performance and Technical information on engines for Harley-Davidson motorcycles. The potential to make power is greater with the M8 vs the 110. What is the difference between Harley 103 and 103 high output?. Best Cam for Harley 103 – S&S Cycle HP 103 or S&S Cycle MR103. This means that the 110 will have more power and torque than. Stage 4: Stage 4 includes a huge diameter, higher compression combo. getting into the 110+ isnt a big deal,but gets into some issues that most riders dont want to deal with. Fierce performing camshaft for an array of engine sizes, large displacement 103", 110" and 124" engines looking for a superior torque band with excellent horsepower gains in heavy bikes (2200 - 6250 rpm) Smaller high-revving displacement 95" style engines in lighter bikes looking to twist the throttle and tap into some horsepower (2500 - 6800 rpm). I've had several Harleys over the years and have always used Screamin' Eagle parts with satisfactory results. Screamin' Eagle Twin Cam Stage IV Kit. 103 is a top end change. Here we bring the best options based on different Harley engines. Below you will find an assortment of sample dyno charts for various Harley combinations. 7 percent more torque than the standard 103, although no horsepower figures are offered. 95) from Harley-Davidson Genuine Motor Accessories produces the maximum horsepower output for. 2:1 forged high-compression pistons and rings, Screamin’ Eagle-259 cams, H-D perfect-fit pushrods, high-capacity roller tappets, OE-quality cam cover gaskets, a heavy-duty clutch spring, and a. 010 to assure proper gasket sealing. Considered as the sixth gear that reduces the engine rpm by 11% for smooth riding on highways. Read More Harley 103 Stage 4 vs. Is anyone using these, or can someone give me an "informed" opinion about them as to reliability. Heads will support over 140 HP. Stage 4: Which One Will Improve Your Ride. 103 stg4- we have done 30 of these kits, good overall power (110-115hp and trq)assuming you have a good tune and exhaust as well. What are the 4 Stages for Harley-Davidson? Stage 1: Intake, exhaust, and ECM remapping Stage 2: Cam upgrade with adjustable pushrods Stage 3: Big bore cylinders, matching pistons, and cam upgrade Stage 4: Stage 3 + Upgraded heads, clutch components, throttle body, and lifters How much is a Screamin’ Eagle upgrade?. The Fuel Moto 110" Big Bore offers the biggest bolt on displacement available for H-D Twin Cam 96" and 103" motors, it features our 110 Extreme Duty Cylinders with special high tensile strength steel sleeves that drop on without case boring. To go 110 requires boring the cases which means total teardown. All EFI-equipped models require ECM calibration* (priced separately). Features & Benefits 4" Bore bolt on cylinder and piston kit uses a New Low Friction Ductile Cast Iron liner to improve thermal conductivity and improve performance. Runner Up (for 88, 96, 103) – Feuling 525 or S&S. 2014 Street Glide Stock vs. A 4 valve head will flow more air and a Harley motor, hell any motor, is just an air pump. I'm considering going to the Screamin' Eagle 103 Stage III or IV kit listed in the H-D catalog. It would be best if you matched up to your camshafts with your engine’s needs. 6-speed Cruise Drive transmission Harley Davidson bikes usually have this feature. There are reliability issues in 103 stage 4, but some comparison in every aspect. The 110" Power Package is the ideal combination of performance and savings to transform your Twin Cam HD without breaking the bank. In both the 110" and 117" kit, the hi strength steel liners are the "trick" that allows a bigger bore to fit in the case bore where previously a case bore would be required to accommodate the larger cylinder bore. There is a little pre-iginition at low RPM especially on take-off maily caused by the higher compression ratio. Get a look at a detailed comparison of the new Milwaukee-Eight engine VS the old Twin Cam both built up to their max capabilities with Genuine Scr Show. 110, which performs better? Is there any confusion about this?. We can work your heads or you can do our head exchange program. Some have the 259E, some the Feuling 574, and one has the Feuling 594. 103 Upgrade and Dyno Results. My 110" could pull away some from other 110's that I had ridden with. Stage V Tire Shredder kit installed and out the door for $2930. Causes: Insufficient cooling, blocked injectors, too lean a fuel mixture Very Lean If the engine is running dangerously lean the whole plug tip will be grey or white. D Screamin' Eagle 103" Stage III or IV kit. The new Screamin’ Eagle Street Performance Stage 4 Kit – 103 Cubic Inches (P/N 92500011, $1,849. Further maintenance alterations, such as gearbox, brake, clutches, and other enhancements, would be needed as well. It's not bad but she does like higher rpm's more than you will find with the 110 stage I with the SE 255 cams. The 103 costs around $26,000, while the 110 costs around $28,000. My local dealership is running a special through the winter Stage V Tire Shredder kit installed and out the door for $2930. Unlike the Stage IV welded and CNC-ported heads, these CNC-ported heads have a larger 1. Stage 4: Which One Will Improve Your Ride">Harley Stage 3 vs. 103 stg4- we have done 30 of these kits, good overall power (110-115hp and trq)assuming you have a good tune and exhaust as well. Stage III results in approximately 100 lb. The Fuel Moto 110" Big Bore offers the biggest bolt on displacement available for H-D Twin Cam 96" and 103" motors, it features our 110 Extreme Duty Cylinders with special high tensile strength steel sleeves that drop on without case boring. Note: this is a fraction of the charts from our database and testing. Stage IV same EXCEPT substitutes a 260 cam and INCLUDES SE Pro 110+ heads. 94” intake valve instead of the 1. it can be made to run much better, compression, the right cams, (don't get all hung up on torque cams you have a 110, it has plenty of torque) great exhaust and a good air filter, with a Seprt, or PCV, and do not even ride past a Harley dealer with the intent of making p. A tuned 103 will beat a stock 110. Harley 103 Stage 4 Vs 110, Which one is Better?. 103 is a top end change. I considered the Stage IV but it's an extra $1K and I could not justify spending that much more for the extra 10 HP at 6200 RPM. 5:1 high compression pistons and rings, SE 58mm throttle body, SE CNC ported cylinder heads, SE-259 cams, perfect-fit pushrods, top end gasket kit, and heavy duty clutch. Anyone done SE Stage 4 103?. PARTS YOU GET BACK ARE BASICALLY OF NO VALUE, NO ONE CARES TO MUCH ABOUT BUYING STOCK HEADS AND CYLS. of torque, and 82 HP, with slightly broader power bands for both. The factory horsepower rating of the Harley 103 engine is about 64hp, and it is measured at about 5000 RPM. And an S&S 111 is about $6200 picked up at your indy's, so that would be your do not exceed number. Discussion Starter · #3 · Jul 14, 2010. I've added roughly 10% in over hp and torque from the canned tune settings. 110: What to choose? There are ways to improve the performance of the 103, but the 110 has a lot of good features (I think). Guess this is a new kit for 2015, takes the stock 103 up to a 110ci making around 105-110hp. 103 stg4- we have done 30 of these kits, good overall power (110-115hp and trq)assuming you have a good tune and exhaust as well. 7 Best Battery for Harley-Davidson: Buyer’s Guide 2022. Or I could keep stock heads and keep the cost about the same. These stages are: Stage I (Air flow - intake, exhaust, ECM) Stage II (Cam - torque or horsepower) Stage III (bore and compression increase comes with cam) Stage IV (New heads, throttle. Harley Cam Comparison Chart Harley engine components control how much air and fuel your engine can take in at a given time. 95) from Harley-Davidson Genuine Motor Accessories produces the maximum horsepower output. 103 stage2 or 110 stage 1. I did the stage one on my blackline recently with the 103 , 2into 1 big radius screaming eagle breather, also screaming eagle pro race tuner my dynos were after 79. Harley Davidson Spark Plug Cross Reference. Stage III results in approximately 100 lb. The clutch is slightly stiffer to operate but I can get used to that. The 110 isn't anything to brag about, just like every other Harley engine. With the 103 with stage IV using the SE 259e cams if you have the bike loaded you will find you will be revving the motor a little so she doesn't buck when getting. Final Notes Harley 103 stage 4 vs. M How much horsepower does a 103 Screamin Eagle have? 103 hp This Street Performance kit produces 103 hp and 110 ft-lbs of torque. 00 (the heads are $1150 in the SE book!). 10 Key Differences Between Harley's Milwaukee.Harley Davidson 103 Engine Problems & Solutions ">5 Harley Davidson 103 Engine Problems & Solutions. The new Screamin’ Eagle Street Performance Stage 4 Kit – 103 Cubic Inches (P/N 92500011, $1,849. The Milwaukee-Eight 107 accelerates 11 percent quicker 0-60 mph and 11 percent quicker 60-80 mph in top gear than the Twin Cam High Output 103. A tuned 103 will beat a stock 110. 100/110 Power Package for 1999. The 594 did little better than the others on hp and Torque. And at 30K you will probably need to bore the jugs and the crank will be a 50/50 die roll as far as condition. This kit includes SE CNC Ported Factory Cylinder heads, 58mm ETC throttle body, SE-259E cams, 10. The 103 has a displacement of 1,690cc, while the 110 has a much larger displacement of 1,823cc. Top 7 Harley 103 Engine Performance Upgrades To Get More Power Out Of. Rasconzo. 5 torq this is without cams i was preety happy with them results. It had V&H Power Duals and was tuned by one of the best also and ran flawlessly. Where the stock 110 engine levels out at just over 4,200 RPM, the Muscle 110″ kit kicks into overdrive and raises horsepower by 45%! Peak horsepower climbs from the mid-80’s to the high-120’s with torque over 100 ft/lbs from 2,500 through 6,500 RPM, breaking the 120 ft/lb barrier along the way. Could we go with a Harley 103 stage 4 engine instead of a 110 engine?. What are the 4 Stages for Harley-Davidson? Stage 1: Intake, exhaust, and ECM remapping Stage 2: Cam upgrade with adjustable pushrods Stage 3: Big bore cylinders, matching. Here's my thoughts but I really want y'alls as well The Stage IV is the best deal, no doubtthe difference between the two is $492. but once you get going all I can say is hang on. I believe it was 125 Hp and 130 Torque. Naturally if you tune the 110 it will always be more powerful than a 103 but it also weighs. Stage 4: Stage 4 includes a huge diameter, higher compression combo. To go 110 requires boring the cases which means total teardown. Guess this is a new kit for 2015, takes the stock 103 up to a 110ci making around 105-110hp. Features & Benefits 4" Bore bolt on cylinder and piston kit uses a New Low Friction Ductile Cast Iron liner to improve thermal conductivity and improve performance. A short Video Clip showing the Difference in power between Two Harley Davidsons 103 vs 110 engine (Both are Stage One) Show more Show more 16:30 103 to 110 Engine Build Wilkins. Typically, this would entail a larger carburetor mechanism and pistons varying on the different models. Naturally if you tune the 110 it will always be more powerful than a 103 but it also weighs more. A 110 can be plenty reliable. Screamin' Eagle® Street Performance Stage 4 Kit - 103 Cubic Inches. 1 should get you mid 70s and shy 90 trq. *Recalibration is required for proper installation, and will allow engine to rev to 6200 RPM. com">Twin Cam 88, 95, 96, 103 and 110 CID engines. If the temperature is over 850-degrees, pre-ignition may occur. one more reliable than the other? : r/Harley">103ci or 110ci ? Is one more reliable than the other? : r/Harley. New guy here. When I had the 110" a riding bud had a 2013 RG with a 103 that he upgraded cams and I could not run off and leave him. My local dealership is running a special through the winter Stage V Tire Shredder kit installed and out the door for $2930. Largest big bore kit available without crankcase mods Increase displacement to 100” (1999-’06) or 110” (2007-’17) Cylinders fit to pistons- No machining required. A 110 can be plenty reliable. On the chart there are two runs - before and after. 103ci or 110ci ? Is one more reliable than the other? : r/Harley. The 574 had 120Hp and 125 Torque. 3:1, stock throttle body and injectors you can have 115hp and 122 torque with a decent pipe and tune but more importantly have 100+ torque from 2,000-5000 rpm Reply Save Like Thermodyne · #7 · Nov 2, 2020. Largest big bore kit available without crankcase mods Increase displacement to 100" (1999-'06) or 110" (2007-'17) Cylinders fit to pistons- No machining required. 110: Head to Head Comparison. The High Output Twin Cam 103 gets more cam lift and a better-flowing airbox for more torque compared to a standard Twin Cam 103. Harley 103 stage 4 vs. 96ci vs 103ci: Questions (2010 model year). Screamin' Eagle Twin Cam Stage IV Kit - 103CI to 103CI | Harley-Davidson USA Home Motorcycle Parts & Accessories Screamin' Eagle Performance Performance Kits Make. All of the above torque and horsepower figures were measured at the rear wheel by H-D technicians using a Dynojet Dynamometer. Harley 103: Screamin Eagle Stage 4 Kit.110ci stage 1 vs 103 stage 4 kits. According to HP and TQ, there shouldn't be a large difference.