Wiseco Chevy SB RED Series Piston Set 4005in Bore 1250in Compression Height 0927in Pin - Set of 8

Starting with a 4.005-inch bore and a 1.250-inch compression height, this set of eight Wiseco RED Series pistons is built for serious performance in Chevrolet Small Block engines. These aren't your average pistons; they're forged from 2618 aluminum, a material chosen for its high tensile strength, which is crucial when you're pushing an engine hard, especially with power adders like turbos or superchargers. Wiseco's Race Engineered Design (RED) philosophy means these pistons are specifically crafted to give you a competitive edge.

You'll find horizontal slot oiling in the pin bores, a detail that ensures your wrist pins and the small end of the connecting rods stay well-lubricated, which is key for long service life under demanding conditions. The dedicated forgings allow for an optimized, engine-specific strutted design, meaning Wiseco engineers have figured out how to get the most strength possible while keeping the weight down. Plus, each set comes with premium rings, so you don't have to hunt for compatible ones. The ArmorGlide skirt coating is a nice touch, helping to reduce friction and noise while also cutting down on wear on the skirts and cylinder walls.

An accumulator groove is also included to help maintain consistent ring seal, which translates directly to consistent power delivery. These pistons are forged and machined in the USA, reflecting a commitment to quality. Keep in mind that these are not CARB approved and cannot be shipped to California.