Polished finish. OEM style rocker cover. Complete set for one cylinder head. Includes gaskets. Hardware is not included. Note: Rocker cover sets come with 07-22 late-style gaskets. These will retro-fit to early 04-06 Sportsters. Note: Will fit 86-90 XL crankcase vented models when the umbrella valve is not used.
With OEM style bottom feed and return oil line placement. Fully CNC machined to maintain close tolerance and strict quality control. This pump is not equipped with a rear chain oiling provision. All S&S billet pumps comes complete with everything you need to replace the stock pump and include mounting instructions. Machined with an oil pressure relief bleed off passageway & relieves pressure build up on top of the valve to maintain consistent oil pressure. Oil pressure regulation bypass routes excess oil directly to the supply side of the pump & reduces the amount of oil returned to the tank; less foaming and cavitation. Note: There may be more differences in Harley-Davidson crankcases than you might think. Plugging or drilling a hole is sometimes necessary. S&S offers a drill jig as MCS 518150. This is a special tool that is mounted on the crankcase and used as a guide to help you drill holes correctly.
With bottom feed & return oil lines. CNC machined from billet 6061-T651 aluminum; with a clean custom appearance. The Jims Flow-Pro 1 oil pump increases oil scavenging (return) when compared with stock pumps. Less oil dragging on the flywheels is more power to the engine. All four oil pump feed and return gears are individually matched to each oil pump body; creating a maximum efficiency pump. Note: 73-81 cases will require one simple drilling step; for which the S&S oil pump drill jig (MCS 518150) can be used. No provisions are made for front or rear chain oiling.
With top feed & return oil lines. CNC machined from billet 6061-T651 aluminum; with a clean custom appearance. The Jims Flow-Pro 1 oil pump increases oil scavenging (return) when compared with stock pumps. Less oil dragging on the flywheels is more power to the engine. All four oil pump feed and return gears are individually matched to each oil pump body; creating a maximum efficiency pump.
510." valve lift. IOG = gear drive cams with Inner & Outer drive Gears. Complete kit with installation hardware; bearings and gasket. Bolt-in 88" to 95" with up to 9.7:1 CR (unported heads) 3000-5500 RPM. The gear drive system is in fact a revolutionary different and much more reliable construction. Especially in high lift/performance applications; when compared with the OEM chain-drive design. A gear driven camshaft is stronger and will not give any of the mechanical problems connected with the OEM chain driven camshafts. The S&S gear drive kit will increase valve timing accuracy; and therefore horsepower; by eliminating the timing chain lash and loosely fit stock cam gears. The only downside of gear drive is that you may experience a slight increase in mechanical sound; this is why OEM is using a chain. It has no other mechanical advantages whatsoever. Since the chain guides and tensioner are eliminated there is no longer the possibility for these parts to fail and damage other engine parts. The S&S gear drive kit reverses the direction of rotation of the rear cam; providing additional operating clearance between cam lobes. As a result; higher cam lifts are possible with the S&S gear driven cams. Note: With the exception of the 475G and 510G cam; adjustable pushrods (like MCS 503573) are required to compensate for the smaller camshaft base circle of these cams. Note: Material may have to be removed from the inner surface of the OEM gear cover before installation o
.625" valve lift. IOG = gear drive cams with Inner & Outer drive Gears. Complete kit with installation hardware; bearings and gasket. 95"-up with 10.0:1 to 10.8:1 CR. The gear drive system is in fact a revolutionary different and much more reliable construction. Especially in high lift/performance applications; when compared with the OEM chain-drive design. A gear driven camshaft is stronger and will not give any of the mechanical problems connected with the OEM chain driven camshafts. The S&S gear drive kit will increase valve timing accuracy; and therefore horsepower; by eliminating the timing chain lash and loosely fit stock cam gears. The only downside of gear drive is that you may experience a slight increase in mechanical sound; this is why OEM is using a chain. It has no other mechanical advantages whatsoever. Since the chain guides and tensioner are eliminated there is no longer the possibility for these parts to fail and damage other engine parts. The S&S gear drive kit reverses the direction of rotation of the rear cam; providing additional operating clearance between cam lobes. As a result; higher cam lifts are possible with the S&S gear driven cams. Note: With the exception of the 475G and 510G cam; adjustable pushrods (like MCS 503573) are required to compensate for the smaller camshaft base circle of these cams. Note: Material may have to be removed from the inner surface of the OEM gear cover before installation of the S&S outer drive gears. Note: T
.640" valve lift. IOG = gear drive cams with Inner & Outer drive Gears. Complete kit with installation hardware; bearings and gasket. 95"-up with 10.5:1 to 11.5:1 CR (stock in S&S 124" engines). The gear drive system is in fact a revolutionary different and much more reliable construction. Especially in high lift/performance applications; when compared with the OEM chain-drive design. A gear driven camshaft is stronger and will not give any of the mechanical problems connected with the OEM chain driven camshafts. The S&S gear drive kit will increase valve timing accuracy; and therefore horsepower; by eliminating the timing chain lash and loosely fit stock cam gears. The only downside of gear drive is that you may experience a slight increase in mechanical sound; this is why OEM is using a chain. It has no other mechanical advantages whatsoever. Since the chain guides and tensioner are eliminated there is no longer the possibility for these parts to fail and damage other engine parts. The S&S gear drive kit reverses the direction of rotation of the rear cam; providing additional operating clearance between cam lobes. As a result; higher cam lifts are possible with the S&S gear driven cams. Note: With the exception of the 475G and 510G cam; adjustable pushrods (like MCS 503573) are required to compensate for the smaller camshaft base circle of these cams. Note: Material may have to be removed from the inner surface of the OEM gear cover before installation of the S&S
For use with 5.330" standard length cylinders. Converts stock hydraulic lifters to solids. Includes 4 non-adjustable pushrods with 4 adjustable solid lifter conversion adapters. Pushrod sets are manufactured of 7/16" O.D. chromoly steel tubing with pressed-in and heat treated steel ends. This combination provides maximum strength and durability; regardless of performance application.
Silver finished cylinders. Bigger is usually better when it comes to performance. This bolt-on big bore Sidewinder kit is as big as possible; without requiring additional work. No need for engine removal; splitting and boring the cases or even re-balancing the flywheels. Just swap the stock cylinders and pistons for these S&S 4" big bore parts and you''re ready to rock with 100HP! (note). 4" bore for stock 4-3/8" stroke. 10.5:1CR with stock heads. Forged .75" pop-up piston. Fits stock 96/103" models with stock 4-3/8" stroke. Note: S&S measured 101.39 HP and 118.92 torque. They additionally used S&S 585 cams; Power Tune headers; slip-on mufflers; the stock EFI throttle body and a S&S Stealth air cleaner. Note: Not for use with S&S 79cc cylinder heads.
Black finished cylinders. Bigger is usually better when it comes to performance. This bolt-on big bore Sidewinder kit is as big as possible; without requiring additional work. No need for engine removal; splitting and boring the cases or even re-balancing the flywheels. Just swap the stock cylinders and pistons for these S&S 4" big bore parts and you''re ready to rock with 100HP! (note). 4" bore for stock 4-3/8" stroke. 10.5:1CR with stock heads. Forged .75" pop-up piston. Fits stock 96/103" models with stock 4-3/8" stroke. Note: S&S measured 101.39 HP and 118.92 torque. They additionally used S&S 585 cams; Power Tune headers; slip-on mufflers; the stock EFI throttle body and a S&S Stealth air cleaner. Note: Not for use with S&S 79cc cylinder heads.
Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ''micro-welding''. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation; final tolerance will be 0.003". The piston creates its own perfect tolerance during run-in; the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117" M8 engines; cylinder must be bored to 4.125" big bore size. Case boring is not required; OEM weight so rebalancing is not required and works with stock 4.500" stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr.; offset: 0.025". Piston: +1.9cc/Flat top. Compression height: 1.083". Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8" / Stroke stock 4.500".
Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ''micro-welding''. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation; final tolerance will be 0.003". The piston creates its own perfect tolerance during run-in; the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117" M8 engines; cylinder must be bored to 4.125" big bore size. Case boring is not required; OEM weight so rebalancing is not required and works with stock 4.500" stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr.; offset: 0.025". Piston: +1.9cc/Flat top. Compression height: 1.083". Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8" / Stroke stock 4.500".
Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ''micro-welding''. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation; final tolerance will be 0.003". The piston creates its own perfect tolerance during run-in; the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117" M8 engines; cylinder must be bored to 4.125" big bore size. Case boring is not required; OEM weight so rebalancing is not required and works with stock 4.500" stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr.; offset: 0.025". Piston: +1.9cc/Flat top. Compression height: 1.083". Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8" / Stroke stock 4.500".
Semi-Polished finish. Carefully designed by the guys of Esteves Motorcycle Design. Manufactured in sand-cast aluminum to bring a classic industrial touch back into the design of the modern M8 for an engine look that may surprise you. Note: Perfect to style match with the EMD M8 cam cover. Note: Sold in pairs.
11.1:1 compression ratio. Piston kit includes forged pistons; rings; wristpins and clips. Crankcases do not require boring. Big bore 4.250" cylinders are required; OEM cylinders can not be bored to 4.250". 107" to 124" pistons come with 1.143" deck height and are compatible with the OEM 107" 4.375" stroke. Note: For 4.250" big bore cylinders only see S&S 574121 (black wrinkle) or 547122 (black wrinkle with higlighted fins). Note: Gaskets are sold separately as 591055 head gaskets; 591054 base gaskets or 591056 head & base gasket kit. Note: S&S recommends an S&S 550 series cam; which are available in both chain or gear drive. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
11.1:1 compression ratio. Piston kit includes forged pistons; rings; wristpins and clips. Crankcases do not require boring. Big bore 4.250" cylinders are required; OEM cylinders can not be bored to 4.250". 107" to 124" pistons come with 1.143" deck height and are compatible with the OEM 107" 4.375" stroke.Note: For 4.250" big bore cylinders only see S&S 574121 (black wrinkle) or 547122 (black wrinkle with highlighted fins). Note: Gaskets are sold separately as 591055 head gaskets; 591054 base gaskets or 591056 head & base gasket kit. Note: S&S recommends an S&S 550 series cam; which are available in both chain or gear drive. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
11.1:1 compression ratio. Piston kit includes forged pistons; rings; wristpins and clips. Crankcases do not require boring. Big bore 4.250" cylinders are required; OEM cylinders can not be bored to 4.250". 117" to 128" pistons come with 1.0805" deck height and are compatible with the OEM 4.500" stroke. Note: See S&S 574121 (black wrinkle) or 547122 (black wrinkle with higlighted fins) for 4.250" big bore cylinders only. Note: Gaskets are sold separately as 591055 head gaskets; 591054 base gaskets or 591056 head & base gasket kit. Note: S&S recommends an S&S 550 series cam; which are available in both chain or gear drive. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.
With black wrinkle finish cylinders. More than just a regular big bore kit. Consists of a complete of piston kits with cylinders; a bolt-in 482 camshaft set for unrestricted breathing and a high performance hydraulic lifter set. Fine-tuned components to bring out the best in real world performance & reliability. No re-balancing required. Note: This is a kit to be used with 1200 XL Sportsters only; it will not work with 883 heads.
Complete OEM reproduction style replacement pushrod cover kit with everything included for a hassle-free installation. Repl. 17950-48 retainer spring cap; 17935-48B upper cover; 17945-36B spring cap; 17947-36 spring; 6762B spring washer and 17938-48B lower cover.
+.200" for use with 5.530" extra long cylinders. Converts stock hydraulic lifters to solids. Includes 4 adjustable pushrods with 4 non-adjustable solid lifter conversion adapters. Pushrod sets are manufactured of 7/16" O.D. chromoly steel tubing with pressed-in and heat treated steel ends. This combination provides maximum strength and durability; regardless of performance application.
Fits OEM sized engines with -.175" shorter cylinders. Fits 88" with 5.375" cylinders. Fits 107" engines with 4.870" cylinders. Fits 111" engines with 4.764" cylinders. Pushrods are adjustable and can be used as hydraulic or run as solids. Pushrod sets are manufactured of 7/16" O.D. chromoly steel tubing with pressed-in and heat treated steel ends. This combination provides maximum strength and durability; regardless of performance application. Note: Stock cylinders are 5.550" with cylinder height specifications based on crankcases with stock Evo B.T. deck height. Note: Some large bore S&S engines have crankcases with a higher deck height and therefore shorter cylinders but stil may require the same length pushrods.
Fits OEM sized engines with -.050" shorter cylinders. Fits 93" engines with 5.450" long cylinders (-.050" shorter). Fits 113" engines with 4.995" long cylinders. Fits 117" engines with 4.889" cylinders. Pushrods are adjustable and can be used as hydraulic or run as solids. Pushrod sets are manufactured of 7/16" O.D. chromoly steel tubing with pressed-in and heat treated steel ends. This combination provides maximum strength and durability; regardless of performance application. Note: Stock cylinders are 5.550" with cylinder height specifications based on crankcases with stock Evo B.T. deck height. Note: Some large bore S&S engines have crankcases with a higher deck height and therefore shorter cylinders but stil may require the same length pushrods.
Fits OEM sized engines with +.075" longer cylinders. Fits 98" engines with 5.625" long cylinders (+.075" longer). Fits 124" engines with 5.014" long cylinders. Pushrods are adjustable and can be used as hydraulic or run as solids. Pushrod sets are manufactured of 7/16" O.D. chromoly steel tubing with pressed-in and heat treated steel ends. This combination provides maximum strength and durability; regardless of performance application. Note: Stock cylinders are 5.550" with cylinder height specifications based on crankcases with stock Evo B.T. deck height. Note: Some large bore S&S engines have crankcases with a higher deck height and therefore shorter cylinders but stil may require the same length pushrods.
Cork seals type. Complete OEM reproduction style replacement pushrod cover kit with everything included for a hassle-free installation.
Complete OEM reproduction style replacement pushrod cover kit with everything included for a hassle-free installation.
Forged low compression Wiseco piston kit. 7:1 compression ration (stock is around 8:1) for improved reliability. Includes wrist pins; circlips and Hastings rings. Note: These Wiseco pistons will fit stock style Hastings rings with 1.2mm (0.047") top & middle ringlands and a 4.75mm oil ring.
Standard 9:1 compression ratio ratio with forged flat top pistons. Includes Hastings rings; circlips and wrist pins.
Very high 12:1 compression ratio. Racing only. Standard 3-1/2" bore; domed pistons. Includes forged pistons; Hastings rings; wrist pins and circlips. Note: See 908655 for a replacement Hastings piston ring set. Note: Oversizes are not available.
High 10.5:1 compression ratio with forged domed pistons. Includes Hastings rings; wrist pins and circlips.
96-103" big bore conversion kit. 9:1 compression ratio. Converts the stock 96" Twin Cam to 103" with stock heads. Stock cylinders must be bored from 3 3/4" (3.750") to 3-7/8" (3.875") to accept the 103" big bore pistons. Comes with reversed dome forged pistons; Hasting rings; circlips and wrist pins.
96-103" big bore conversion kit. 10.5:1 compression ratio. Converts the stock 96" Twin Cam to 103" with stock heads. Stock cylinders must be bored from 3 3/4" (3.750") to 3-7/8" (3.875") to accept the 103" big bore pistons. Comes with reversed dome forged pistons; Hasting rings; circlips and wrist pins.
96-103" big bore conversion kit. 10.5:1 compression ratio. Converts the stock 96" Twin Cam to 103" with stock heads. Stock cylinders must be bored from 3 3/4" (3.750") to 3-7/8" (3.875") to accept the 103" big bore pistons. Comes with reversed dome forged pistons; Hasting rings; circlips and wrist pins.