Wiseco Chevy LS 4.000in 1.165in CH -17.00 CC Piston Set

Starting with a 2618 aluminum forging, these Wiseco pistons are machined in the USA to handle the demands of serious racing builds. The 4.000-inch bore size is a common specification for many popular LS engine configurations, and the 1.165-inch compression height is critical for achieving the correct deck height and compression ratio when paired with your chosen crankshaft and connecting rods.

Wiseco has packed these Professional Series pistons with features aimed at durability and performance under extreme conditions. You'll find precision-machined ring grooves, anti-detonation grooves, and other features designed to improve ring seal, which is vital for consistent power and engine health. The crown is also fully machined for accuracy. For reduced friction and improved seizure resistance, these pistons come with an ArmorGlide skirt coating, which also helps quiet down operation. The forced pin oiling system ensures the wrist pin receives adequate lubrication, a key factor in preventing premature wear in high-stress applications.

This set includes eight pistons, along with premium rings, ready for installation in your heavy to severe duty LS engine build. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and break-in procedures.