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Engine & Performance

Choose from Engine & Performance products for Harley-Davidson, American V-twin and compatible motorcycle applications. Across the range you will find products for engine components. Compatibility varies, so match the stated model, year and technical details before ordering.

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S&S Cycle Roller Rocker Arms Forged Front Rear 8620 Steel Set of 4
£559.18 - £559.18
£559.18
£559.18 - £559.18
£559.18

S&S Cycle Roller Rocker Arms Forged Front Rear 8620 Steel Set of 4 #900-1084

in stock

DescriptionRoller Rocker ArmsDesigned usng Finite Element Analysis (FEA) and forged from 8620 steel for strengthEliminate thrusting on valves for d...

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£559.18 - £559.18
£559.18
£559.18 - £559.18
£559.18
S&S Cycle Roller Rocker Arms Forged Front Rear 8620 Steel Set of 4
£730.41 - £730.41
£730.41
£730.41 - £730.41
£730.41

S&S Cycle Roller Rocker Arms Forged Front Rear 8620 Steel Set of 4 #900-4098A

in stock

DescriptionRoller Rocker ArmsForged from 8620 steel, heat-treated then shot-peened for additional strength and durability3/4" long bushings instead...

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£730.41 - £730.41
£730.41
£730.41 - £730.41
£730.41
S&S Cycle Roller Rocker Arms Forged Front Rear 8620 Steel Set of 4
£596.64 - £596.64
£596.64
£596.64 - £596.64
£596.64

S&S Cycle Roller Rocker Arms Forged Front Rear 8620 Steel Set of 4 #900-4320A

in stock

DescriptionRoller Rocker ArmsMachined from 8620 steel heat treated forgings for maximum strength0.750" long S&S rocker arm bushing which provid...

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£596.64 - £596.64
£596.64
£596.64 - £596.64
£596.64
S&S Cycle Roller Rocker Arms Forged Front Rear 8620 Steel Set of 4
£596.64 - £596.64
£596.64
£596.64 - £596.64
£596.64

S&S Cycle Roller Rocker Arms Forged Front Rear 8620 Steel Set of 4 #900-4065A

in stock

DescriptionRoller Rocker ArmsForged from 8620 steel, heat-treated then shot-peened for additional strength and durability3/4" long bushings instead...

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£596.64 - £596.64
£596.64
£596.64 - £596.64
£596.64
S&S Cycle Forged Standard Rocker Arm 8620 Steel Set of 4
£298.76 - £298.76
£298.76
£298.76 - £298.76
£298.76

S&S Cycle Forged Standard Rocker Arm 8620 Steel Set of 4 #900-4119A

in stock

DescriptionForged Standard Rocker ArmAn economical solution for stock rebuilds, and mild performance upgradesForged from 8620 steel for greater str...

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£298.76 - £298.76
£298.76
£298.76 - £298.76
£298.76
S&S Cycle 0.585” Valve Spring Kit
£147.26 - £147.26
£147.26
£147.26 - £147.26
£147.26

S&S Cycle 0.585” Valve Spring Kit #900-0595

in stock

Description0.585” Valve Spring KitUnique S&S design dual-spring kit reduces the risk of valve floatFor valve lift to 0,585” with 1,800”/ 130 lb...

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£147.26 - £147.26
£147.26
£147.26 - £147.26
£147.26
S&S Cycle 0.585" Street Performance Valve Spring Kit Steel
£148.41 - £148.41
£148.41
£148.41 - £148.41
£148.41

S&S Cycle 0.585" Street Performance Valve Spring Kit Steel #900-0593

in stock

Description0.585" Street Performance Valve Spring KitUnique S&S design dual-spring kit reduces the risk of valve floatSuitable for high perform...

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£148.41 - £148.41
£148.41
£148.41 - £148.41
£148.41
S&S Cycle 0.650" Sidewinder® Valve Spring Kit
£268.38 - £268.38
£268.38
£268.38 - £268.38
£268.38

S&S Cycle 0.650" Sidewinder® Valve Spring Kit #106-5909

in stock

Description0.650" Sidewinder® Valve Spring KitInclude springs, upper and lower collars and keysFor valve lift to .650" with 1.860" /178 lbs. instal...

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£268.38 - £268.38
£268.38
£268.38 - £268.38
£268.38
S&S Cycle 0.650" Sidewinder® Valve Spring Kit
£265.27 - £265.27
£265.27
£265.27 - £265.27
£265.27

S&S Cycle 0.650" Sidewinder® Valve Spring Kit #900-0050

in stock

Description0.650" Sidewinder® Valve Spring KitInclude springs, upper and lower collars and keysFor valve lift to .650" with 1.860" /178 lbs. instal...

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£265.27 - £265.27
£265.27
£265.27 - £265.27
£265.27
S&S Cycle Cam Chest Kit for M8 540 Big Bore Torque Camchest Kit Chain
£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92

S&S Cycle Cam Chest Kit for M8 540 Big Bore Torque Camchest Kit Chain #310-1116A

Only 5 left!

DescriptionCam Chest Kit for M8Oil Pump/Cam Plate:Precision machined from billet aluminiumBlue anodised finishPassage plugs removable for servicing...

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£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92
S&S Cycle Cam Chest Kit for M8 540 Big Bore Torque Camchest Kit Chain
£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92

S&S Cycle Cam Chest Kit for M8 540 Big Bore Torque Camchest Kit Chain #310-1118A

Only 3 left!

DescriptionCam Chest Kit for M8Oil Pump/Cam Plate:Precision machined from billet aluminiumBlue anodised finishPassage plugs removable for servicing...

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£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92
S&S Cycle Cam Chest Kit for M8 550 Big Bore Camchest Kit Chain
Sold out
£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92

S&S Cycle Cam Chest Kit for M8 550 Big Bore Camchest Kit Chain #310-1082B

Out of stock

DescriptionCam Chest Kit for M8Oil Pump/Cam Plate:Precision machined from billet aluminiumBlue anodised finishPassage plugs removable for servicing...

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£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92
Sold out
S&S Cycle Cam Chest Kit for M8 475 HP Camchest Kit Chain
£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92

S&S Cycle Cam Chest Kit for M8 475 HP Camchest Kit Chain #310-1008B

Only 3 left!

DescriptionCam Chest Kit for M8Oil Pump/Cam Plate:Precision machined from billet aluminiumBlue anodised finishPassage plugs removable for servicing...

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£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92
S&S Cycle Cam Chest Kit for M8 465 Performance Camchest Kit Chain
Sold out
£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92

S&S Cycle Cam Chest Kit for M8 465 Performance Camchest Kit Chain #310-1007B

Out of stock

DescriptionCam Chest Kit for M8Oil Pump/Cam Plate:Precision machined from billet aluminiumBlue anodised finishPassage plugs removable for servicing...

View full details
£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92
Sold out
S&S Cycle Cam Chest Kit for M8 475 HP Camchest Kit Chain
Sold out
£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92

S&S Cycle Cam Chest Kit for M8 475 HP Camchest Kit Chain #310-1000B

Out of stock

DescriptionCam Chest Kit for M8Oil Pump/Cam Plate:Precision machined from billet aluminiumBlue anodised finishPassage plugs removable for servicing...

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£1,811.92 - £1,811.92
£1,811.92
£1,811.92 - £1,811.92
£1,811.92
Sold out
S&S Cycle 590G Gear Drive Camshaft Kit Big Bore Max HP Raw
£398.50 - £398.50
£398.50
£398.50 - £398.50
£398.50

S&S Cycle 590G Gear Drive Camshaft Kit Big Bore Max HP Raw #330-0732

in stock

Description590G Gear Drive Camshaft KitDesigned specifically for use with monster bores and ported heads (not recommended for stock bore engines)Im...

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£398.50 - £398.50
£398.50
£398.50 - £398.50
£398.50
S&S Cycle 590C Chain Drive Camshaft Kit Big Bore Max HP Raw
£256.53 - £256.53
£256.53
£256.53 - £256.53
£256.53

S&S Cycle 590C Chain Drive Camshaft Kit Big Bore Max HP Raw #330-0730

in stock

Description590C Chain Drive Camshaft KitAll-out horsepower cam for 124” and larger enginesDesigned specifically for use with monster bores and port...

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£256.53 - £256.53
£256.53
£256.53 - £256.53
£256.53
S&S Cycle 540G Camshaft Kit Big Bore Torque Gear
£398.50 - £398.50
£398.50
£398.50 - £398.50
£398.50

S&S Cycle 540G Camshaft Kit Big Bore Torque Gear #330-0715

in stock

Description540G Camshaft KitDesigned to add even more torque to your big bore M8, for those that keep the revs below 6000 rpm when combined with 12...

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£398.50 - £398.50
£398.50
£398.50 - £398.50
£398.50
S&S Cycle 540C Camshaft Kit Big Bore Torque Chain
£256.53 - £256.53
£256.53
£256.53 - £256.53
£256.53

S&S Cycle 540C Camshaft Kit Big Bore Torque Chain #330-0713

in stock

Description540C Camshaft KitDesigned to add even more torque to your big bore M8, for those that keep the revs below 6000 rpm when combined with 12...

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£256.53 - £256.53
£256.53
£256.53 - £256.53
£256.53
S&S Cycle Cam Lock Washer for 1966-1999 bt Sprocket Spacing Alignment/Thrust Washer
£13.51 - £13.51
£13.51
£13.51 - £13.51
£13.51

S&S Cycle Cam Lock Washer for 1966-1999 bt Sprocket Spacing Alignment/Thrust Washer #33-5201

Only 4 left!

DescriptionCam Lock Washer for 1966-1999 btCam Lock Washer for 1966-1999 big twinReplaces OEM p/n 25550-57AOne required per engine, sold eachSpecif...

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£13.51 - £13.51
£13.51
£13.51 - £13.51
£13.51
S&S Cycle Cam Chest Kit for M8 550 Big Bore Camchest Kit Gear
£1,876.33 - £1,876.33
£1,876.33
£1,876.33 - £1,876.33
£1,876.33

S&S Cycle Cam Chest Kit for M8 550 Big Bore Camchest Kit Gear #310-1083A

Only 3 left!

DescriptionCam Chest Kit for M8All parts in each kit are matched to ensure superior quality, fit, finish and performanceOil pump and cam plate are ...

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£1,876.33 - £1,876.33
£1,876.33
£1,876.33 - £1,876.33
£1,876.33
S&S Cycle Cam Chest Kit for M8 465 Performance Camchest Kit Gear
£1,553.06 - £1,553.06
£1,553.06
£1,553.06 - £1,553.06
£1,553.06

S&S Cycle Cam Chest Kit for M8 465 Performance Camchest Kit Gear #310-1009A

in stock

DescriptionCam Chest Kit for M8All parts in each kit are matched to ensure superior quality, fit, finish and performanceOil pump and cam plate are ...

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£1,553.06 - £1,553.06
£1,553.06
£1,553.06 - £1,553.06
£1,553.06
S&S Cycle Chain Drive Cam Chest Kit Easy Start Camchest Kit
£2,131.81 - £2,131.81
£2,131.81
£2,131.81 - £2,131.81
£2,131.81

S&S Cycle Chain Drive Cam Chest Kit Easy Start Camchest Kit #330-0546

Only 3 left!

DescriptionChain Drive Cam Chest KitUpgrade to S&S bolt-in performance camshaftsS&S Quickie pushrods - easy installation, without removing ...

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£2,131.81 - £2,131.81
£2,131.81
£2,131.81 - £2,131.81
£2,131.81
S&S Cycle 550 Camshaft Kit Big Bore Gear
£398.50 - £398.50
£398.50
£398.50 - £398.50
£398.50

S&S Cycle 550 Camshaft Kit Big Bore Gear #330-0647

in stock

Description550 Camshaft KitKit includes all required bearings, o-rings, and hardwareIdeal horsepower cam for 114" and larger enginesMaximizes peak ...

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£398.50 - £398.50
£398.50
£398.50 - £398.50
£398.50

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