🚀 Elevate Your Engine's Performance! Complete set for a full engine overhaul. Trustworthy performance with GM's original specifications. Designed specifically for GM LS Series engines. Machined exterior for long-lasting use. Crafted for optimal performance and reliability. 8.128 x 26.416 x 8.128 cm 4.4 lbs weight Made in USA The GM Performance 12499225 Hydraulic Roller Lifter is a premium auto part designed specifically for GM LS Series engines. This pack of 16 lifters ensures a perfect fit and enhanced durability, making it an essential upgrade for any performance enthusiast. With a weight of 4.4 pounds and precise dimensions, these lifters are engineered for reliability and optimal performance, proudly made in the USA.