Some very important engine components in the Lightweight engines are Pistons,Connecting Rods,Spark Plugs, Hybrid bearings and special coatings to these components.

Spears Racing has been designing and making race pistons for decades,their 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.

Piston Rings:
Piston rings provide a sliding seal between the outer edge of the piston and the inner edge of the cylinder.

The rings serve two purposes:

They prevent the fuel/air mixture and exhaust in the combustion chamber from leaking into the sump during compression and combustion.
They keep oil in the sump from leaking into the combustion area, where it would be burned and lost.

Connecting rod
The connecting rod connects the piston to the crankshaft. It can rotate at both ends so that its angle can change as the piston moves and the crankshaft rotates.