VALVE SPRING CHEV SB/HOLD V8 PERF

Valve springs are one of the most critical and overlooked components in your engine. They must be matched to your cam in order for the engine to reach its full potential. It does absolutely no good to install a cam that will perform up to 8,000 rpm if you do not have the correct springs. Use the only valve springs that will give the recommended spring pressure with the valve both on the seat and at maximum lift.Chev small block and Holden 253-308, Single with a damper valve springs, each. Seat presure 110lbs at 1.7 inch closed, 294lbs at 1.21 inch open, max valve lift 480 thou at 1.7 inch, coil bind at 1.160 inch.