Cylinders & Pistons - M8

43 products

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

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$4,081.99

Take your 121″ CVO to 136″ The S&S Cycle 136″ Big Bore Kit delivers serious performance while keeping the factory look intact. Our 4.320″ bore forged pistons and color matched cylinders are de...

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$4,081.99

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$4,081.99

ROLLIES SPEED SHOP

$2,383.99

Features & Benefits:- * 4.250″ Bore Cylinder & CP Carrillo # CAR-M5110 = 11.0:1 Pistons * Black with CNC Machined Fins * Includes Dowel Pins * Replaces OEM # 16800075 or 16800095 Suggested...

ROLLIES SPEED SHOP

$2,383.99

Features & Benefits:- * 4.250″ Bore Cylinder & CP Carrillo # CAR-M5111 = 11.5:1 Pistons * Black with CNC Machined Fins * Includes Dowel Pins * Replaces OEM # 16800075 or 16800095 Suggested...

ROLLIES SPEED SHOP

$2,383.99

Features & Benefits:- * 4.250″ Bore Cylinder & CP Carrillo # CAR-M5112 = 12.0:1 Pistons * Black with CNC Machined Fins * Includes Dowel Pins * Replaces OEM # 16800075 or 16800095 Suggeste...

ROLLIES SPEED SHOP

$2,371.99

Features & Benefits:- * 4.250″ Bore Cylinder & Keith Black # KB596LCA.STD = 11.7:1 Pistons * Black with CNC Machined Fins * Includes Dowel Pins * Replaces OEM # 16800075 or 16800095 Sugge...

128ci Big Bore Kit with Highlighted Fins - Black. Fits Milwaukee-Eight 2017up 114ci Engine. - S&S

$3,705.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci to 128ci * 114ci to 128ci Big Bore Kit * 4.250″ Bore * 4.500″ Stroke (4-1/2″) * Forged Pistons. * 11.1 Compression Ratio. * Wrinkle Blac...

$3,706.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci & non-CVO 117ci to 132ci * 4.320″ Bore * 4.500″ Stroke (4-1/2″) * Forged Pistons. * 11.1 Compression Ratio. * Wrinkle Black Finish. ...

KIBBLEWHITE

$407.99

KPMI Cylinder Studs are made from 180,000 psi yield strength, fine grain, heat treated, aircraft grade alloy steel. When you want a stud that meets proof-stress and maximizes clamping force, look ...

FEULING

$599.99

* 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...

$269.99

Big bore, big compression and big throttle take their toll on hard parts and engine studs are no different. If your motor sees any of these we recommend stepping up to S&S Chrome Moly Head Stu...

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CP CARRILLO PISTONS

$1,294.99

Features & Benefits:- * The ring pack has been moved down 0.080″ to prevent the breakage issues the Stock HD cast pistons are having. * Bore = 4.085″ * Stroke = 4.625″ * Fully CNC machined * ...

DAYTONA JAPAN

$1,186.99

Features & Benefits:- * 4.250″ Bore * Black with CNC Machined Fins * Includes Dowel Pins (Does NOT include Pistons) * Replaces OEM # 16800075 or 16800095 Suggested Additional Purchase: 1.a) To...

$640.99

Cylinder Studs: Features & Benefits:- * 4140 Chrome Moly studs, oil quenched and tempered to 39-44 HRC * 180,000psi Tensile Strength * Rounded thread roots, rather than flat, improving fatigu...