Custom made in the USA for Good Parts. The titanium construction is stronger than other aftermarket aluminum options and half the weight of the original steel retainers. Actual weight is 6.1 grams compared to the original 11.3 gram intake and 12.3 gram exhaust retainer. The durable one-piece design fits both intake and exhaust valve springs.
Works with High Performance Valve Spring sets (SKU 21 and SKU 3078) and original valve springs. Fits both dual and single original size valve springs. Increases the installed height of the valve spring by approximately 0.050 inches from original spec.
Minimum outer spring inside diameter: 0.793 inches
Minimum inner spring inside diameter: 0.580 inches