Cylinders & Pistons

160 products

Shop the range of aftermarket motorcycle engine products at Pro Class Custom Parts.

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$866.99

Features & Benefits:- * Bore = 4.000″ * Stroke = 4.375″ * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined * Best resistance to cracking in hi-co...

KB PISTONS

$866.99

Features & Benefits:- * Bore = 4.010″ * Stroke = 4.375″ * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined * Best resistance to cracking in hi-co...

KB PISTONS

$865.99

Features & Benefits:- * Bore = 3.875″ * Stroke = 4.375″ * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined * Best resistance to cracking in hi-c...

DAYTONA JAPAN

$515.99

Features & Benefits:- * 3.875″ Bore * Black with CNC Machined Fins * Sold each, fits front & rear * Includes Dowel Pins (Does NOT include Pistons) * Replaces OEM # 16547-99A Suggested Addi...

$407.99

Features & Benefits:- * Replacement Piston Rings for S&S Milwaukee-Eight 107ci to 129ci & 114ci to 132ci Big Bore Kits (4.320″ Bore) Tech Tips:- * Always follow Piston Ring Fitment Ins...

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$417.99

Features & Benefits:- * Replacement Piston Rings for CVO 110ci engines that are equipped with S&S High Compression Pistons # SS940-0114. * Sold as a Pair. Tech Tips:- * Ring Fitment Instru...

FEULING

$398.99

* The strongest studs available! * Top engine builders demand quality fasteners! Secure your engine with complete confidence * Superior in strength and performance to any other cylinder stud kit o...

$385.99

Features & Benefits:- * Replacement Piston Rings for S&S Milwaukee-Eight 107ci to 124ci & 114ci to 128ci Big Bore Kits. (4.250″ Bore) Tech Tips:- * Always follow Piston Ring Fitment In...

COLONY MACHINE

$243.99

Features & Benefits:- * OEM Style Heat Treated Alloy Steel Studs Equal or Surpass Original Equipment. * Set of 8 Studs. * Replaces OEM # 16834-99 Proudly Made in the USA by Colony Machine ! Su...

$225.99

Features & Benefits:- * Moly Faced. * Sold Each/Per Piston * 2 Required Per Bike. Proudly Made in the USA by S&S Cycle !

$223.99

Features & Benefits:- * Sold per Piston. * Replacement Piston Rings for S&S 110ci Big Bore Kits #’s SS910-0598 & SS910-0599. Tech Tips:- * Ring Fitment Instructions must be followed ca...

100ci Big Bore Kit - Black. Fits Twin Cam 1999-2006 - S&S

$3,221.99

Features & Benefits:- * Upgrades Twin Cam 88ci to 100ci. * Cast Ductile Iron Liner; Increases Thermal Conductivity, Aids in Heat dissipation & Improves Ring Seal. * Includes 8.75cc pop up ...

110ci Big Bore Kit - Black. Fits Twin Cam 2007-2017 - S&S

$3,221.99

Features & Benefits:- * Upgrades Twin Cam 96ci & 103ci to 110ci. * Cast Ductile Iron Liner; Increases Thermal Conductivity, Aids in Heat dissipation & Improves Ring Seal. * Includes 8....

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117ci Big Bore Kit - Black. Fits Twin Cam 2007-2017 - S&S

$3,794.99

* 117″ Standard Compression – Flat Top Pistons * Note: Crankcases must be bored to accept the larger 4-1/8″ bore cylinders * Compression Ratios: 85cc Stock Heads = 10.9:1 89cc S&S Heads = 10.5...

98ci Big Bore Kit - Silver. Fits Fits Twin Cam 1999-2006 - S&S

$2,851.99

Features & Benefits:- * Includes 10cc Dome Forged Pistons. * Includes 0.045″ Head Gaskets. * 3.937″ Bore. * 4″ Stroke. * 10.3:1 Compression Ratio with Stock 85cc Heads. * 9.9:1 Compression Rat...