Wiseco Chevy SB RED Series Piston Set 4165in Bore 1250in Compression Height 0927in Pin - Set of 8

These Wiseco RED Series pistons start with a 4.165-inch bore and a 1.250-inch compression height, featuring a 0.927-inch pin diameter. They are built using Race Engineered Design (RED) principles, meaning they're forged and machined in the USA from 2618 aluminum. This material choice is crucial for the tensile strength demanded by high-performance racing engines, especially those running power adders like turbochargers or superchargers.

Wiseco has incorporated several thoughtful features to ensure these pistons perform and last. Horizontal slot oiling in the pin bores is a key detail that keeps the wrist pin and the small end of the connecting rod properly lubricated, which is vital for preventing premature wear. The dedicated forgings allow for an engine-specific strutted design, which helps maximize strength while keeping weight down. You'll also find an ArmorGlide skirt coating, designed to reduce friction and noise during operation, while also minimizing wear on both the piston skirt and the cylinder wall. Plus, each set comes with premium rings, so you don't have to source those separately, and an accumulator groove is included to help maintain consistent ring seal and power output.

This set of eight pistons is a solid option for anyone rebuilding a Chevrolet Small Block engine for serious performance applications, from drag racing to circle track. Keep in mind that these are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.