Evo Big Twins - Engine Components

DescriptionFlywheel Assembly Flywheels are CNC machined from heat-treated, closed die, steel forgings, and are stronger than cast iron or late styl...

DescriptionCylinder Dowels Designed for HD® Evolution OEM replacement Machined from steel and has a black oxide coating for corrosion resistance Ca...

DescriptionRocker Arm Shafts Made from bearing quality steel, precision centerless ground 66% stronger, preventing damage from radical cam profiles...

DescriptionCast Iron Valve Guide Precision-machined from cast iron Compatible with no-lead fuel and accept any type of valve-stem material Made in ...

DescriptionAdjustable Pushrods 0.4375" diameter chromoly steel for maximum strength Made in the USA Rocker boxes must be removed for installation o...

DescriptionChrome Rocker Boxes Positive O-ring seal ensures leak-free operation Includes rocker boxes, gaskets and mounting bolts Rocker arm suppor...

DescriptionScorpion™ Spark Plug Head Bolt Covers Covers add a classy touch to any motor Held in position with setscrews to prevent noisy rattling S...

DescriptionNitrided Valve One-piece stainless-steel, stellite-tipped valve is fortified by a special nitrided process with .002" depth and .0002" s...

DescriptionOil Pressure Sending Unit Cover High-quality, chromed, die-cast cover Requires the sending unit to be removed for installation For singl...

DescriptionTappet Block Covers Show-chromed die-cast covers Install in minutes Includes chrome hardware Sold as a set Specifications Units: Pair ...

DescriptionCompression Release Valve State-of-the-art design to help reduce hot start issues and starter/​battery loads Have 5-7 Newtons of closing...

DescriptionCast Iron Valve Guide Precision-machined from cast iron Compatible with no-lead fuel and accept any type of valve-stem material Made in ...

DescriptionC630 Valve Guides Precision-machined from copper based C63000 nickel-aluminium bronze Compatible with no-lead fuel and accept any type o...

DescriptionValve Guide Kit Made from Manganese that can be easily reamed and honed with battery operated or electric drill High concentricity toler...

DescriptionValve Guide Kit Made from Manganese that can be easily reamed and honed with battery operated or electric drill High concentricity toler...

DescriptionValve Guide Kit Made from Manganese that can be easily reamed and honed with battery operated or electric drill High concentricity toler...

DescriptionValve Guide Kit Made from Manganese that can be easily reamed and honed with battery operated or electric drill High concentricity toler...

DescriptionNitrided Valve One-piece stainless-steel, stellite-tipped valve is fortified by a special nitrided process with .002" depth and .0002" s...

DescriptionValve Guide Kit Made from Manganese that can be easily reamed and honed with battery operated or electric drill High concentricity toler...

DescriptionNitrided Valve One-piece stainless-steel, stellite-tipped valve is fortified by a special nitrided process with .002" depth and .0002" s...

DescriptionCompression Release Valve State-of-the-art design to help reduce hot start issues and starter/​battery loads Have 5-7 Newtons of closing...

DescriptionHigh Chrome Valve Seats Contain 18% - 22% Chromium for resistance to abrasion, corrosion and deformation Nickel content of 1% - 2% for a...

DescriptionHigh Chrome Valve Seats Contain 18% - 22% Chromium for resistance to abrasion, corrosion and deformation Nickel content of 1% - 2% for a...

DescriptionCompression Release Valve State-of-the-art design to help reduce hot start issues and starter/​battery loads Have 5-7 Newtons of closing...