Engine

All KPMI Black Diamond® stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond®” process improves wear properties, reduces friction, and provides resistance to...

Slightly domed for a cleaner lookHardware included

Slightly domed for a cleaner lookHardware included

Made from rugged die-cast aluminumChrome, Black and Satin black finished availableNo hardware includedNarrow profile primary slim the profile of the motorcycle for sleek lookNarrow primary allows shorter riders to have better footing when backing in or...

These compensator sprockets and components are direct OE replacements.

Chrome oil filler cap is a great way to customize any bike

Performance hydraulic roller liftersOptimized oil flow to top end - valves, springs, rockers, shafts & valve guidesCooler oil and reduced wearExtends life of top end valve gearCNC machined and precision groundDrop in replacement for stock liftersDyno...

The strongest studs available!Feuling® studs are installed to a torque spec can be reused and carry a lifetime warrantyHeat-treated 8740 chrome moly steel studsStock replacementKit includes 8 cylinder studs, moly assembly lubricant and thread sealantMade...

Factory assembled and trued to OEM specifications Drop in replacement crankshaft requires no modification unless noted CNC machined and dynamically balanced to suit the increased stroke Add +2.00 mm to +4.00 mm of stroke depending on application Uses...

Silent chain Exclusive heat-treated links create excellent friction and impact resistance Engineered to exceed OEM specifications and tolerances. CAM CHAIN HC98XRH2015080

Silent chain Exclusive heat-treated links create excellent friction and impact resistance Engineered to exceed OEM specifications and tolerances. CAM CHAIN HC92RH2015110

The M8 engines come with oil coolers that circulate oil to the heads with majority of the oil returning to the stock oil cooler. Harleys stock oil cooler simply is not enough to keep the M8s from overheating in traffic and city riding. The side Mount...