Chevrolet Performance LS-Series Lifters are available as original equipment manufacturer (OEM) production replacement lifters for your everyday driver/street machine or racing lifters developed by GM Racing and Powertrain division to withstand the rigors of sustained high rpm usage! Replacement lifter guides are also available and are recommended to replace any damaged or worn components while servicing the lifters. You can rest assured that these Chevrolet Performance Parts are manufactured with high-quality materials you can trust to maintain the reliability and performance of your LS-powered vehicle!