The Spring Kit is a drop-in high performance spring kit for all OE LS cylinder heads and is rated for up to .600" lift.
This spring kit uses all OE hardware, including seats, retainers, and locks and is 100% drop-in.
The 1218s are an ovate beehive spring that has increased loads, rates and frequencies for more aggressive cams.
This is a full set of 16 of Springs Per Valve: Single
Outside Diameter of Outer Spring (in): 1.290 in.
Coil Bind Height (in): 1.140 in.
Damper Spring Included: No
Install Load: 130lbs
Install Height: 1.800"
Open Height: 1.175"
Open Load: 318 lbs
Spring Rate (lbs/in): 313 lbs./in.
Inside Diameter of Outer Spring (in): 0.885 in.
Valve Spring Style: Beehive
Applications: Gen III and Gen IV GM LS Engines.
16 x SpringsNOTE:
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