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FTI LSx Dual Valve Spring Kit GEN6B-K1

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Your Price:
$399.99 (You save $30.00)
7.00 LBS
Calculated at checkout

Product Description

FTI GEN6B PAC Racing Dual Valve Spring Kit (Steel Retainers)

Hardcore racers and top engine builders of cylinder heads with forced induction and high RPM powerplants, now have a brand new, small diameter extreme usage valve spring, chromemoly spring retainer, hardened valve lock and Viton valve seal kit that extends engine RPM and boosts valvetrain performance capability. This custom built, PAC Racing 1208X based kit features precision wound, heat-set, dual valve springs for required seat and open load pressure plus total spring travel to accommodate cams with aggressive lobes and gross valve lifts of up to .750” at the valve.

The valve springs in each kit are carefully tension matched and all supplied components come complete and ready to install. Included are CNC machined, chromemoly alloy spring retainers, CAD designed to deliver maximum strength and durability. Precision fit spring locators are included and are designed to accurately locate the inner spring, preventing abrasion with aluminum heads. Precision machined and hardened 4140 steel alloy 7-degree valve locks are also provided for superior valve stem holding reliability. Premium quality, Viton® steel reinforced valve stem seals are included for correct valve stem lubrication and oil control.

The PAC Racing 1208X is a severe duty valve spring designed for lightweight LSx style valvetrain used in a high RPM or forced induction engine. Perfect for turbocharged engines. Will fit most aftermarket cylinder heads with small 1.300" diameter dual spring packages. PAC Racing's proprietary alloy using round wire construction.


1) Choose your valve stem diameter: 11/32" or 8mm

2) Choose your valve seal diameter: .500" or .531" guide top

3) Choose your valve guide diameter: .500" or .563" guide base

The standard spring kit contains lightweight chromemoly retainers but you can upgrade to the optional titanium or tool steel retainers. Certain aftermarket cylinder heads may require a custom built version of this kit. Email for more information on custom cylinder head applications.


  • 1.324" Outside Diameter
  • 0.694" Inside Diameter
  • Maximum lift: .750"
  • Seat load: 160# at 1.800"
  • Open load: 482# at 1.100"
  • Rate: 460 lb/in
  • Coil bind: 1.000"




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