Cylinders & Pistons

* 117" Standard Compression - Flat Top Pistons * Note: Crankcases must be bored to accept the larger 4-1/8" bore cylinders * Compression Ratios: 85...

* 117" Standard Compression - Flat Top Pistons * Note: Crankcases must be bored to accept the larger 4-1/8" bore cylinders * Compression Ratios: 85...

Features & Benefits:- * Includes 3cc Dome Forged Pistons. * Includes 0.045" Head Gaskets. * 3.937" Bore. * 4-3/8" Stroke. * 10.5:1 Compression ...

Features & Benefits:- * Includes 3cc Dome Forged Pistons. * Includes 0.045" Head Gaskets. * 3.937" Bore. * 4-3/8" Stroke. * 10.5:1 Compression...

S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® ...

S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® ...

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci & non-CVO 117ci to 132ci * 4.320" Bore * 4.500" Stroke (4-1/2") * Forged Pistons. *...

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci & non-CVO 117ci to 132ci * 4.320" Bore. * 4.500" Stroke (4-1/2"). * Forged Pistons....

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci to 128ci * 114ci to 128ci Big Bore Kit * 4.250" Bore * 4.500" Stroke (4-1/2") * Forged ...

Features & Benefits:- * Upgrades Milwaukee-Eight 107ci to 129ci. * 4.320" Bore. * 4.375" Stroke (4-3/8"). * Forged Pistons. * 11.1 Compression ...

Features & Benefits:- * Upgrades Milwaukee-Eight 107ci to 129ci. * 4.320" Bore. * 4.375" Stroke (4-3/8"). * Forged Pistons. * 11.1 Compression...

* Bore=3.498" - Stroke=3.812 * Hypereutectic Alloy is a cast 16% silicon content material * Perfect for air cooled engines * Low thermal expansion ...

Features & Benefits:- * Bore = 3.518" * Stroke = 3.812" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled ...

Features & Benefits:- * Bore = 3.508" * Stroke = 3.812" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled ...

Features & Benefits:- * Bore = 3.498" * Stroke = 3.812" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled ...

* High quality, direct replacement chrome-moly piston ring kit * One Set Required Per Bike * Made in the USA * Replaces OEM # 22266-86

Features & Benefits:- * Fits 1600 Series Pistons * The Series will be a Number inside the Piston crown. * Moly Faced. * Sold as a Pair. Tech T...

Features & Benefits:- * Custom Look. * Polished & Chrome Plated, 12 Point Dome Top Headbolts. * Replaces OEM 16480-92 and OEM 16478-85A Tec...

* Machined from solid bronze bar stock * Hold concentricity to less than .0002" * Sold as a Pair. * Made in the U.S.A. * Ream with JIMS# No.1726. ...

Features & Benefits:- * Will Not Fit XR1200 * Includes silver cylinders. * Includes MLS Head Gaskets, Base Gaskets & Exhaust Gaskets. * In...

Features & Benefits:- * Fits Sportster 1986-2021 including Sportster 2004-2021. * Will Not Fit XR1200 * Includes Black Cylinders. * Includes Fl...

* CAR-RSS1660-3937-0THG * ID # 6916 * Gas Nitride Top Ring, 1.2mm 2nd Ring Taper Hook Groove (Napier), 3.0mm Oil Ring, 3.937 bore * Sold per cylind...

* Steel 1.0mm Top Ring, 4.250 bore * Sold per cylinder/piston * Middle Ring = 2-MS28-4250-THG * Bottom Ring = 3-D30-4250-0

* 3.0mm .150 Radial Wall Low Tension Flex Vent Oil Ring, 4.250 bore * Sold per cylinder/piston * Top Ring = 1-MS18-4250 * Middle Ring = 2-MS28-4250...

Features & Benefits:- * Bore = 3.238" * Stroke = 3.812" * Fits Iron Head Sporty. * Hypereutectic Alloy is a cast 16% silicon content material. ...

Features & Benefits:- * Bore = 3.218" * Stroke = 3.812" * Fits Iron Head Sporty. * Hypereutectic Alloy is a cast 16% silicon content material. ...

Features & Benefits:- * Bore = 4.134" * Stroke = 2.953" * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from ...

Features & Benefits:- * Bore = 3.875" * Stroke = 4.000" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled ...

Features & Benefits:- * Bore = 3.875" * Stroke = 4.000" * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then full...

Features & Benefits:- * Bore=3.875" * Stroke=4.000" * Hypereutectic Alloy is a cast 16% silicon content material * Perfect for air cooled engi...

Features & Benefits:- * Bore = 3.885" * Stroke = 4.000" * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then full...

Features & Benefits:- * Bore = 3.885" * Stroke = 4.000" * Hypereutectic Alloy is a cast 16% silicon content material * Perfect for air cooled e...

* These forged 3-7/8" bore stroker pistons for 1999-2006 Twin Cam are required for the S&S 106" stock bore stroker kit with 4-1/2" stroke flywh...

Features & Benefits:- * Bore = 3.875" * Stroke = 4.375" * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then ful...

Features & Benefits:- * Bore = 3.875" * Stroke = 4.375" * Flat Top with slight hollow Dome. * Forged 4032 Alloy is an 11% silicon alloy that is...

Features & Benefits:- * Bore = 3.885" * Stroke = 4.375" * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then full...

Features & Benefits:- These high compression pistons feature a 7cc raised dome to achieve a compression ratio of 11:1 (from 9.5:1). Higher comp...

Features & Benefits:- * ID # 6435 * Bore = 3.875" * Stroke = 4.000" * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * ...

Features & Benefits:- * Bore = 3.937" * Stroke = 4.000" * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from ...

Features & Benefits:- * Bore = 3.937" * Stroke = 4.000" * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from ...

Features & Benefits:- * ID # 6442 * Bore = 3.875" * Stroke = 4.000" * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * ...

Features & Benefits:- * Bore = 3.937" * Stroke = 4.000" * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from ...

Features & Benefits:- * ID # 2434 * Bore = 3.885" * Stroke = 4.000" * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * ...

Features & Benefits:- * Bore = 3.498" * Stroke = 4.250" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled ...

Features & Benefits:- * Bore = 3.498" * Stroke = 4.250" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled ...

Features & Benefits:- * Bore = 3.498" * Stroke = 4.250" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled ...

Features & Benefits:- * Bore = 3.538" * Stroke = 4.250" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled ...

Features & Benefits:- * Bore = 3.528" * Stroke = 4.250" * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled...