Engine builders, this COMP Cams spring seat is serious quality for high-performance applications! The 1.55 inch inner diameter fits standard valve springs perfectly. Made from hardened steel alloy, it can handle extreme spring pressures and high RPMs that would destroy cheaper shims. The precise dimensions (1.55 x 0.630 x 0.730 inches) ensure proper fit and alignment in your valve train. I've used these in both street and race engines where spring stability is crucial - they maintain perfect alignment even under intense conditions. The hardened construction resists wear and deformation over time, which is essential for maintaining consistent valve timing. Installation is straightforward if you're familiar with engine assembly. Whether you're building a mild street engine or an all-out race motor, these spring seats provide the durability and precision you need. They're a must-have upgrade from older style standard shims that can't handle modern spring pressures. The quality is exactly what you'd expect from COMP Cams - professional grade components that deliver reliable performance. Definitely worth using if you want peace of mind about your valve train stability at high RPM!
Free 30-day returns 
Free 30-day returns
