Wiseco RED Series Chevy LS 4.000in Bore 1.105in CH -20.00 CC Piston Set

If you're building a high-performance Chevy LS engine for racing, whether it's for drag strips or circle tracks, you need pistons that can handle the stress. Wiseco's RED Series pistons are built for exactly that. They use a Race Engineered Design (RED) approach, meaning they're forged and machined in the USA from strong 2618 aluminum to give you the tensile strength required for serious performance and power adder applications.

These pistons feature a horizontal slot oiling system in the pin bores. This is a smart detail that keeps the wrist pin and the small end of the connecting rod well-lubricated, which is crucial for making sure these parts last under high loads. Wiseco also uses dedicated forgings for each engine application, allowing them to create an optimized strutted design that maximizes strength while keeping the weight down. To further reduce friction and wear, they're coated with ArmorGlide on the skirts, which also helps quiet things down. Plus, each set comes with premium rings, so you won't have to hunt for compatible ones.

This set is designed for a 4.000-inch bore and has a compression height of 1.105 inches with a -20.00 CC dish. An accumulator groove is included to help maintain consistent ring seal and power delivery. Keep in mind that these pistons are not CARB approved and cannot be shipped to California.