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High compression.
Black cylinders with highlighted fins.
With +8.5cc piston dome.
Compression ratio 12.7:1 for 132" and 13.1:1 for 136" with stock 88cc heads.
Compression ratio 12.1:1 for 132" and 12.3:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels, must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

S&S, M8 132/136" big bore cylinder & piston kit. HC +8.5cc

#709938

Stock:Yes

High compression.
Black cylinders without highlighted fins.
With +8.5cc piston dome.
Compression ratio 12.7:1 for 132" and 13.1:1 for 136" with stock 88cc heads.
Compression ratio 12.1:1 for 132" and 12.3:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels, must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

S&S, M8 132/136" big bore cylinder & piston kit. HC +8.5cc

#709939

Stock:Yes

High compression.
Black cylinders without highlighted fins.
With 0cc piston dome.
Compression ratio 11.7:1 for 132" and 12.1:1 for 136" with stock 88cc heads.
Compression ratio 11.1:1 for 132" and 11.4:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels (121" engines), must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

S&S, M8 132/136" big bore cylinder & piston kit. HC 0cc

#709936

Stock:Yes

High compression.
Black Granite cylinders with highlighted fins.
With +8.5cc piston dome.
Compression ratio 12.7:1 for 132" and 13.1:1 for 136" with stock 88cc heads.
Compression ratio 12.1:1 for 132" and 12.3:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels, must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

Note: Special Order Product only. To order please contact your MCS sales representative.

S&S, M8 132/136" big bore cylinder & piston kit. HC +8.5cc

#709940

Stock:No

High compression.
Black cylinders with highlighted fins.
With 0cc piston dome.
Compression ratio 11.7:1 for 132" and 12.1:1 for 136" with stock 88cc heads.
Compression ratio 11.1:1 for 132" and 11.4:1 for 136" with SE Extreme Port 94cc heads.
Largest possible 4.320" bore bolt-in big bore kit.
132" (2162cc) is achieved when used with stock 114" flywheels.
136" (2222cc) is achieved when used with S&S 923270 4-5/8" stroker flywheels.
Works with stock crankcases, case boring is not required, stock heads and retains stock engine height. Kit includes a forged 4.320" big bore forged piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .040" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels, exhaust gaskets and an S&S cubic inch cam cover badge. Black powder coated finish to match the OEM finish.
Note: For the 132" kit S&S measured 135.51HP and 145.83 torque with stock heads, a 550 cam, stock throttle body and a high flow Stealth air cleaner kit.
Note: Tuning of fuel injection and ignition may be required.
Note: S&S advises 576972 S&S head bolt kit for all big bore applications.
Note: 136" is not compatible with OEM 4-5/8" stroke flywheels, must use S&S 923270 4-5/8" stroker flywheels.
Note: Not compatible with 107" (4.375" stroke) engines.

S&S, M8 132/136" big bore cylinder & piston kit. HC 0cc

#709935

Stock:Yes

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.

S&S, 3-5/8" repl. Evo SuperStock piston kit. +.030"

#512426

Stock:Yes

Chrome plated. Traditionally used with big bore cylinders where space is limited. Great looks in stock applications as well. In chrome or black oxide finish.

Head bolt kit, 12-point. chrome

#514687

Stock:No

8 used, 7/16-24 threaded on both ends, 3 inch long

Streethogs, cylinder head studs

#900383

Stock:Yes

With silver finished 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.

S&S, 883-1250 Hooligan big bore cyl. & piston kit

#592021

Stock:Yes

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.

S&S, 93" (1522cc) 3-5/8" big bore cylinder & piston kit

#512433

Stock:Yes

Chrome, requires removal of studs, incl washers

Cylinder base allen bolt set

#977347

Stock:Yes

Used with or to built a 96" (4-5/8" stroke, 5.565" cyl. length) engine with 3-5/8" big bore cylinders and stock cylinder heads. Compatible with stock length manifold. Approx. 10.1:1 CR. Kits include forged pistons, 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.

S&S, Evo 3-5/8 big bore piston set (OEM heads). Std.

#915212

Stock:Yes

Front & rear cylinder set. Gasket GEN2 Embossed. .020" RCS (Rubber Coated Steel), an embossed steel core with a .001" thick coating of heat resistant nitrile rubber on both sides. OEM replacement reference 16500332

Cometic, cylinder base gasket set .020" RCS Gen2

#923965

Stock:No

S&S, 3-7/16" forged stroker piston kit. Std

#531772

Stock:No

Replacement forged piston set. Fits all 100" and 107" 4" bore Super Sidewinder engines. Will also fit the special (out of production) 100" Evo type retro-fit engine for Shovel chassis, which is equipped with small diameter flywheels. Incl. pistons, wrist pins, wristpin 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.

S&S, 100"/107" 4" bore piston kit. +.010"

#916633

Stock:Yes

Stainless steel, 7/16-20, high torque style, provides extra clearance for big bore cylinders. Fits Stock bore as well.

Streethogs, cyl. Head/base nut

#900377

Stock:Yes

Fits all 79-84 stock 1340cc Shovelheads. Fits 66-78 1200cc Shovels custom equipped with 4-1/4" stroke flywheels (standard 1200 is 3-31/32" stroke). Comes complete with std length gloss black 3-5/8" Big Bore cylinders, forged pistons, rings, wrist pins, head/base gaskets and cylinder head bolts and cylinder base nuts. 7-3/4:1 Compression ratio. This kit combines power from the larger capacity and a very good engine life through the stock 1340cc Harley stroke and moderate compression ratio.

Note: Crankcase spigots must be bored for 3-5/8" cylinders.

S&S, 88" (1436cc) 3-5/8" big bore cylinder & piston kit

#512411

Stock:Yes

Chrome plated steel. Reproduction of OEM 16836-78 spacer. Used between cylinder base and base nut.

Colony, cylinder base stud spacers set. Chrome

#513410

Stock:Yes

Chrome

Colony cyl base nut kit, high-torque

#513040

Stock:No

Polished, 7/16-20 unf

Streethogs, cyl head/base acorn nut

#900382

Stock:Yes