FTI-GEN5 LSx Style Dual Valve Spring Kit (PAC-1222X)
The proper valve springs are one of the most important pieces of a performance engine. Serious street machines, hardcore racers and engine builders of performance cylinder heads now have a brand new, heavy duty usage valve spring, spring retainer, valve lock and seal kit that safely extends engine RPM and boosts performance capability.
This custom built PAC Racing 1222X based valvetrain kit features precision wound, heat-set, LSx style dual valve springs with the required seat and open load pressure plus total spring travel to accommodate cams with modern camshaft lobes with gross valve lifts of up to .700” depending on the installed height. The valve springs contained 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. The hardened and machined spring locators used were designed to accurately locate the inner spring, preventing abrasion and scuffing when using aluminum cylinder heads. Precision machined & 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 1222X is an extreme duty valve spring designed for lightweight LSx style valvetrain used in a endurance and racing applications. Will fit most aftermarket cylinder heads with small 1.300" diameter dual spring packages. PAC Racing's proprietary Pacalloy material and round wire construction are used.
HOW TO ORDER:
1) Choose your valve stem diameter: 11/32", 5/16" 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.
GEN5-LSX VALVE SPRING KIT CONTENTS:
PAC Racing 1222X Dual Valve Springs
1.300” Diameter Spring
180# at 1.800”
.700” Lift Capable
Chromemoly Steel Retainers
Hardened & Machined Valve Locks
Hardened & Machined Spring Locators
Steel Shell Viton Valve Seals
PART NUMBER: FTI-GEN5-LSX-Kit