.660" Polished Dual Spring Kit with Titanium Retainers

The TSP .660" POLISHED Dual Spring Kit is a valve spring upgrade designed for enhanced valvetrain control, even with aggressive hydraulic roller camshafts. It features American-made PAC Racing polished dual valve springs and titanium retainers. The kit also includes a patent-pending Precision Race Components integrated seat/seal for easier installation and improved reliability.

This kit provides excellent durability and stability, working well with factory-style lifters. The polishing process on the PAC springs increases overall spring life and reduces the chances of fatigue and failure without losing pressure.