Wiseco RED Series Chevy Small Block 400 4.155in Bore 1.425in CH -21.00 CC Piston Set

If you're rebuilding a Chevrolet Small Block 400 for serious performance, Wiseco's RED Series pistons are built to handle the demands of racing and power adder applications. These pistons are forged and machined right here in the USA from 2618 aluminum, a material chosen for its high tensile strength, which is crucial when you're pushing an engine hard, whether on the drag strip or the circle track.

Wiseco engineers these pistons with specific features to give you a competitive edge. You'll find horizontal slot oiling in the pin bores, which is a smart way to keep the wrist pin and the small end of the connecting rod properly lubricated, helping to ensure a long service life for these critical components. The dedicated forgings allow for an engine-specific strutted design, meaning Wiseco optimizes the strength-to-weight ratio for your Small Block 400. Plus, each set comes complete with premium rings, so you don't have to hunt for compatible parts separately. The ArmorGlide skirt coating is another notable detail, designed to reduce friction and noise while also minimizing wear on the piston skirt and cylinder wall.

An accumulator groove is also included, which helps maintain consistent ring seal and consistent power delivery. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a robust bottom end that's ready for competition, this set is a solid option.