COMP Cams ID Spring Seats 1.55 X 630 X

If you're building a performance engine that's going to see high RPMs and serious spring pressure, standard shims just won't cut it. COMP Cams offers these ID Spring Seats as a straightforward solution to keep your valve springs properly located and your cylinder heads protected. They're designed to handle the kind of stress that today's race engines dish out, preventing the kind of failures that can happen when springs aren't seated correctly under extreme conditions.

These aren't your typical shims. They're made from a hardened steel alloy, which means they're built to last and resist wear. The unique design features an inboard locating shoulder that centers the seat and keeps the spring firmly in place. This design is a change from older styles that required extensive machining to the cylinder head. The 4777 features a 1.540" outer diameter and a .640" inner diameter, making them a good match for COMP Cams dual valve springs like the 26089, 955, and 943.