Cylinders & Pistons - Evo

29 products

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

$612.99

Features & Benefits:- * Bore = 3.503″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

KB PISTONS

$644.99

Features & Benefits:- * Bore = 3.518″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter ...

KB PISTONS

$644.99

Features & Benefits:- * Bore = 3.508″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter ...

Sold Out

KB PISTONS

$644.99

Features & Benefits:- * Bore = 3.528″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter ...

Sold Out

KB PISTONS

$644.99

Features & Benefits:- * Bore = 3.498″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

KB PISTONS

$612.99

Features & Benefits:- * Bore = 3.518″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter ...

KB PISTONS

$612.99

Features & Benefits:- * Bore = 3.498″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

KB PISTONS

$612.99

Features & Benefits:- * Bore = 3.508″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

FEULING

$340.99

* 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...

COLONY MACHINE

$244.99

* Set of 8 * Replaces OEM # 16837-85 MFR PART No: 9424-8 ROLLIES PART No: CM-9424-8

$3,188.99

Features & Benefits:- * Includes Cast Flat Top Pistons. * Includes Gaskets. * 8.5:1 Compression Ratio with Stock HD Heads. * 8.8:1 Compression Ratio with S&S 76cc Performance Heads # SS106...

$3,002.99

Features & Benefits:- * Includes Cast Flat Top Pistons. * Includes Gaskets. * 8.5:1 Compression Ratio with Stock HD Heads * 8.8:1 Compression Ratio with S&S 76cc Performance Heads # SS106-...

$1,231.99

These forged 3-1/2″ bore stroker pistons for 1984-’99 HD® Evolution® big twin engines are required for the S&S 89″ 4-5/8″ stroker flywheels. Pistons are designed to be used with stock cylinder...

$274.99

Cylinder Stud kit, 3/8-16 x 6.680″, 8 pack. Fits 1984-1999 V-Series engines with less than 4″ bore. * Replaces OEM # 16837-85 MFR PART No: 31-2321 ROLLIES PART No: SS31-2321