Patriot Performance LS Valve Spring Kit .650" Lift (PN:8401) Fits most LS series cylinder heads.

Patriot Performance's legendary Gold spring kit is probably the most used "drop-in" LS dual spring kit in the LS community. These complete spring consists of 16 Patriot Gold dual springs, 16 titanium retainers, 32 Super 7 Machined locks, 16 .505" ID machined spring bases, and 16 viton rubber seals. This kit will work with both stock and aftermarket rocker arms. No cutting or machining of the stock spring pocket is needed.

*1 kit required per pair of heads.

Technical Specs:
Install Height: 1.800"
Max. Valve Spring Lift: 0.650"
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.150"
Coil Bind: 1.090"
Retainer Material: Titanium