1.671" diameter for all 99-17 OEM Twin Cam and S&S 3-piece flywheel assemblies (press-in style) produced after 2013. Incl. crankpin end plugs. Note: For replacement crankpin end plugs see 565133.
1.671" diameter for all 99-17 OEM Twin Cam and S&S 3-piece flywheel assemblies (press-in style) produced after 2013. Incl. crankpin end plugs. Note: For replacement crankpin end plugs see 565133.
For Twin Cooled engines. This is a precision CNC machined oil pump in the S&S blue anodized finish. It offers 20% oil flow increase on the supply side and a 52% scavenge side increase with independent scavenge sections for flywheel cavity and cam chest with debris screens in both scavenge pickups. A magnet in the cam chest will help prevent debris from entering the pump. The pressure relieve valve is adjustable and adjustments can be made with oil pump in engine. Note: Does not fit models with air cooled (oil cooled) engines.
4-1/2" stroke with 8-1/2" diameter flywheels. Stock replacement for S&S engines. No hassle in rebuilding or getting the right parts; it''s all here in one package. These are exactly set-up like the flywheels used in current S&S production engines.
Steel breather valve thrust washer for use with steel beather valves. These spacers fit all S&S breather valves and are identical to L77-99 OEM style (large hole) replacement spacers. Used to set correct end play. Note: Steel breathers require steel breather valve spacers. Plastic breathers require plastic spacers. Do not intermix steel and plastic parts.
Steel breather valve thrust washer for use with steel beather valves. These spacers fit all S&S breather valves and are identical to L77-99 OEM style (large hole) replacement spacers. Used to set correct end play. Note: Steel breathers require steel breather valve spacers. Plastic breathers require plastic spacers. Do not intermix steel and plastic parts.
Steel breather valve thrust washer for use with steel beather valves. These spacers fit all S&S breather valves and are identical to L77-99 OEM style (large hole) replacement spacers. Used to set correct end play. Note: Steel breathers require steel breather valve spacers. Plastic breathers require plastic spacers. Do not intermix steel and plastic parts.
Steel breather valve thrust washer for use with steel beather valves. These spacers fit all S&S breather valves and are identical to L77-99 OEM style (large hole) replacement spacers. Used to set correct end play. Note: Steel breathers require steel breather valve spacers. Plastic breathers require plastic spacers. Do not intermix steel and plastic parts.
Steel breather valve thrust washer for use with steel beather valves. These spacers fit all S&S breather valves and are identical to L77-99 OEM style (large hole) replacement spacers. Used to set correct end play. Note: Steel breathers require steel breather valve spacers. Plastic breathers require plastic spacers. Do not intermix steel and plastic parts.
Steel breather valve thrust washer for use with steel beather valves. These spacers fit all S&S breather valves and are identical to L77-99 OEM style (large hole) replacement spacers. Used to set correct end play. Note: Steel breathers require steel breather valve spacers. Plastic breathers require plastic spacers. Do not intermix steel and plastic parts.
Replacement; recessed dome; forged piston kits for used with S&S Evolution SuperStock heads only in combination with components with stock dimensions (bore 3-1/2"; stroke 4-1/4" and cylinder length 5.550"). S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". Will give approx. 10.1:1 CR. All pistons include wrist pins; wrist pin clips and piston rings. 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.
Replacement; recessed dome; forged piston kits for used with S&S Evolution SuperStock heads only in combination with components with stock dimensions (bore 3-1/2"; stroke 4-1/4" and cylinder length 5.550"). S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". Will give approx. 10.1:1 CR. All pistons include wrist pins; wrist pin clips and piston rings. 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.
Fits all 66-84 Shovelhead models with 4-3/4" stroker flywheels. Comes complete with +.200" (5.530") 3-5/8" big bore gloss black cylinders; forged pistons; rings; wrist pins; head/base gaskets and cylinder head bolts and cylinder base nuts. This large capacity engine will give serious increase in power and torque. Compression ratio 8-1/4:1. Engine life can be expected to be fair; strongly depending on riding habits. Note: Crankcase spigots must be bored for 3-5/8" cylinders. Note: 4-3/4" stroker flywheels in the 8-1/4" special small diameter version must be used (MCS 512370) in combination with a 82-up type crankpin and a S&S sprocket shaft. Flywheels must be purchased separately and come un-balanced.
Replacement recessed dome pistons for 3-5/8" Big Bore applications. Will fit 84-99 Evolution Big Twin models with S&S SuperStock heads only and 3-5/8" bore cylinders in combination with 4-1/4" (5.375" cylinders; 9.4:1CR); 4-1/2" (5.500" cylinders; 9.8:1CR) and 4-5/8" (5.565" cylinders; 10.1:1CR) strokes. S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". All pistons include wrist pins; wrist pin clips and piston rings. 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.
Replacement recessed dome pistons for 3-5/8" Big Bore applications. Will fit 84-99 Evolution Big Twin models with S&S SuperStock heads only and 3-5/8" bore cylinders in combination with 4-1/4" (5.375" cylinders; 9.4:1CR); 4-1/2" (5.500" cylinders; 9.8:1CR) and 4-5/8" (5.565" cylinders; 10.1:1CR) strokes. S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". All pistons include wrist pins; wrist pin clips and piston rings. 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.
Replacement recessed dome pistons for 3-5/8" Big Bore applications. Will fit 84-99 Evolution Big Twin models with S&S SuperStock heads only and 3-5/8" bore cylinders in combination with 4-1/4" (5.375" cylinders; 9.4:1CR); 4-1/2" (5.500" cylinders; 9.8:1CR) and 4-5/8" (5.565" cylinders; 10.1:1CR) strokes. S&S tolerance recommendations: Close fit .0015" to .002". Loose fit: .003" to .004". All pistons include wrist pins; wrist pin clips and piston rings. 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.
The most popular large capacity option for 66-84 Shovelhead models. This kit gives both dependability and a good performance increase. Must be used with 4-1/2" stroker flywheels. Comes complete with +.124" (5.405") 3-5/8" big bore gloss black cylinders; forged pistons; rings; wrist pins; head/base gaskets and cylinder head bolts and cylinder base nuts. Compression ratio around 8.2:1. Engine life can be expected to be very good/good; strongly depending on riding habits. Note: Crankcase spigots must be bored for 3-5/8" cylinders. Note: 4-1/2" stroker flywheels (MCS 512368) must be purchased separately.
Natural aluminum finish. Band-type style. Stock style; 3-5/8 big bore cylinder heads from S&S for 66-84 Shovelhead models. S&S heads are designed as stock replacement. Still; where stock heads flow about 124 cfm @ 10"; S&S heads do improve these figures somewhat and typically flow around 135 cfm @ 10". Heads come assembled with valves; springs; collars; valve guide seals; rocker cover and exhaust mount hardware etc. (excl. rocker arms and covers) and complete with cylinder head; rocker cover and exhaust gaskets. These heads are ready to run and will accept camshafts with a lift of up to .590".
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.
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.
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.
+.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.
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