CMS 4V Stage 3 Spring Kit - .500" lift

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CMS 4V Stage 3 Spring Kit - .500" lift

Home
Camshafts & Valvetrain
Springs & Retainers
CMS 4V Stage 3 Spring Kit - .500" lift

Home
Camshafts & Valvetrain
Springs & Retainers
Mod Motor
CMS 4V Stage 3 Spring Kit - .500" lift

CMS 4V Stage 3 Spring Kit - .500" lift

Price:

$699.00

SKU:

CMS-VS-4V-STG3

Brand:

CMS

Shipping:

Calculated at checkout

Product Description

SPRING SPECS

Seat Pressure	115lbs @ 1.480"
Open Pressure	230lbs @ 1.000"
Spring Rate	240 lbs / in
Coil Bind	.940"
Max Lift	.480"

PAC Stage 3 RPM Series 4V Valve Springs

These Valve Springs are designed for use with 4.6L / 5.4L 4V B, C, 03/04 Cobra / Mach 1 and Navigator Cylinder Heads. They are supplied with 4130 Chrome Moly Retainers with a +.050" Design to raise the Installed Height from the typical 1.430" to 1.480". These Valve Springs have been through multiple anti-fatigue processes and work very well on High Boost / High RPM applications. Good for anything from 10lbs of boost and 6K RPM to 40lbs of boost and 9500 RPM. We have tested these springs after over 300 passes at 9000+ RPM and have not seen any signs of fatigue after checking every single one on our spring tester. Less than 1% change in seat pressure and spring rate.

There really is no need to go any higher than .480" Lift on Non GT500 Style 4V Cylinder Heads. Although these springs are more than capable of handling .500" Lift at a 1.480" Install Height, there really is no reason for it and .480" lift is our suggestion for these springs.