ZUN 16Pcs Drop-In Beehive Valve Spring Kit PAC-1218 For GM LS1 LS2 LS3 LS6 4.8L 5.3L 6.0L 6.2L - .600" 78311969

SKU: GT-78311969
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  • Regular price $47.00
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The PAC-1218 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 PAC-1218s are an ovate beehive spring that has increased loads, rates and frequencies for more aggressive cams. This is a full set of 16 springs.


Number 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

OEM Part Number:




Fit For the Following Models:

LS1, LS2, LS3, LS6, LS7, LS9 LSX Engines

1999-2002 Camaro & Firebird

2010-2013 Camaro

1999-2013 Corvette

2004-2006 Pontiac GTO

2004-2007 Cadillac CTS

2008-2009 Pontiac G8

2000-2013 Tahoe, Yukon, Escalade

2003-2009 H2 Hummer

2001-2013 Chevrolet Avlanche

1999-2013 Silverado & Sierra (4.8L, 5.3L, 6.0L)

Note: If you are uncertain about the compatibility, just send us your VIN. We will check it for you.

Package Includes:

16× Valve Spring

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