Product Description

Texas Speed & Performance TSP .660" Dual Valve Spring Kit with Titanium Retainers

PAC Polished Dual Springs | Fits 4.8L, 5.3L, 6.0L and 6.2L LS Engines

Upgrade the valvetrain in a compatible LS engine with the Texas Speed & Performance .660-inch dual valve spring kit. Developed with PAC Racing, this kit combines polished American-made dual springs with titanium retainers and Precision Race Components integrated spring seats and valve seals. The spring package provides the stability and control needed for aggressive hydraulic roller camshafts while remaining compatible with factory-style lifters.

Key Features & Benefits

PAC Racing Polished Dual Springs: The kit includes American-made PAC Racing dual valve springs rated for camshafts with up to .660-inch valve lift. PAC’s polishing process is designed to improve spring life and reduce the potential for fatigue without sacrificing the spring pressure of the non-polished version.
Integrated Spring Seat and Valve Seal: The patent-pending Precision Race Components design combines the spring seat and valve seal into one component. This integrated configuration eliminates the need for special valve-seal installation tools while helping prevent torn seals or seals becoming dislodged during installation.
Lightweight Titanium Retainers: Titanium retainers are included to complete the upper portion of the spring package. Their lightweight construction reduces valvetrain mass compared with heavier retainer materials while supporting the demands of compatible performance hydraulic roller camshaft combinations.
Strong Valvetrain Control: Developed by Texas Speed & Performance with PAC Racing, these dual springs provide the stability required for more aggressive hydraulic roller camshaft profiles. The spring pressures and dual-spring construction also allow the kit to work effectively with factory-style lifters in compatible LS engines.
Complete Matched Spring Package: The kit includes a set of polished PAC dual valve springs, Precision Race Components integrated spring seats and seals, and titanium retainers. These matched components provide the primary parts needed to upgrade both cylinder heads on the compatible LS engine applications listed below.

Spring Specs

Installed Height: 1.810"
Closed Spring Pressure: 160 lb. at 1.810" Installed Height
Open Spring Pressure: 415 lb. at .660" Lift
Maximum Spring Lift: .660"
Coil Bind Height: 1.015"

Notes

Uses GM factory valve stem locks, which are not included.
Integrated seats and seals fit factory-size valve guides and cannot be used with aftermarket bronze valve guides or most aftermarket cylinder heads equipped with bronze guides.
Will not fit LS7, LS9 or Gen 5 LT1/LT4 engine applications.

Key Fitments

Fits 4.8 5.3 6.0 6.2 LS1 LS2 LS3
Fits: LS1 LS2 LS3 LS6 L99 LSA L92 L9H L94 L76 L77 LY6 L96 LFA LZ1 LY5 LMG LMF LH6 LC9 LY2 L20 L33 LQ4 LQ9 LR4 LM7 L59 LS4 LH8 LH9