Overbore Engine Kits

Spears Racing has been designing and making race pistons with the State of the Art CNC Machining and manufacturing alliances with JE-Pistons for decades.

Spears Racing continuous committed to excellence to advance as the industry changes. This commitment has resulted in more forgings specific to certain applications, proprietary treated wrist pins and piston rings manufactured only for us. Each of these aspects has been put through stringent research and development stages to ensure that our product will exceed your standards.

Spears Racing along with JE-Pistons are continuing to do  research and development both in the dyno room and on the race track while winning championships all over the world.

Utilizing State of the Art CNC machines for manufacturing, along with purpose-designed forgings, while being able to maintain exacting specifications on each and every piston – holding tolerances to millionths of an inch.

All of the pistons are made are from new forging that is lighter than stock OEM Pistons.

Cylinders:

The Cylinders are proprietary Nickel Silicon Carbide (NSC) cylinder plating process and cylinder services. This NSC process is so superior to factory plating that Millennium Technologies is used by professional race teams all over the world to re-plate brand new OEM cylinders. Millennium stands behind their plating with a LIMITED LIFETIME WARRANTY.

Modern engine designs use very light aluminum cylinders. The aluminum base metal is very soft and would wear out almost instantly without a very special protective barrier. The Millennium Technologies Nickel Silicon Carbide (NSC) cylinder plating process forms an extremely hard, extremely durable barrier with less friction, improved heat transfer, less weight, and ultimately more horsepower.

Nickel Silicon Carbide (NSC) plating service includes:
evaluation
stripping
NSC plating
diamond hone finish