TSP .660 Polished Dual Valve Spring Kit with PAC Springs, Titanium Retainers and PRC Integrated Seat/Seals
Texas Speed & Performance .660-inch polished dual valve spring kit for compatible GM LS cylinder heads with factory-size valve guides. The integrated PRC seat and seal simplifies installation while the polished PAC dual springs provide stable valvetrain control for aggressive hydraulic roller camshafts.
- Set of 16 polished PAC dual valve springs
- Titanium retainers
- PRC integrated spring seats and valve seals
- 160 lb closed pressure at 1.810-inch installed height
- 415 lb open pressure at .660-inch lift
- .660-inch recommended maximum lift
- 1.015-inch coil bind height
Fitment note: Designed for compatible LS applications using factory-size valve guides. Not for LS7, LS9, Gen V LT engines, or most aftermarket heads with bronze valve guides. Factory valve locks are reused and are not included.
Processing & Shipping Overview
Processing occurs before shipping.
Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.
Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.
For the most up-to-date order status or lead time questions, please contact sales@smgspeed.com or use live chat during business hours.