General Motors 10166345, Engine Valve Spring Retainer Keeper
- Brian Tooley Racing BTR Steel Retainers for Dual Spring Kit .660".
- BTR STEEL RETAINERS FOR PLATINUM, EXTREME AND 1200 PAC SPRINGS SR001-16.
- Ultra Light Weight Tool Steel Retainers for dual springs, fits most 1.270"-1.300" dual springs made, outer step is .925" and inner step is .670"..
- The lightest steel retainer made for 1.300" dual springs, only weighs 13.9 grams or 16.4 grams with locks. set of 16..