Modular Head Shop / PAC Racing RPM Series. 500 Lift Valve Springs for Ford 4.6L / 5.4L 4V Cylinder Heads - Fits all 4V Heads except Shelby GT500 / Ford GT. These MHS / PAC RPM Series 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 Street / Strip Applications as well as Endurance / Road Race Applications. There really is no need to go any higher than. 480 Lift on Non GT500 Style 4V Cylinder Heads. 500" Lift at a 1.480" Install Height, there really is no reason for it.
Spring rate 240 lbs per inch. Be sure to check out our other listings. We also have Bronze Manganese Valve Guides, Viton Valve Stem Seals and Stainless Valves for the 4.6L / 5.4L 4V Cylinder Heads. The item "Modular Head Shop PAC RPM Series. 500 Lift 4.6L / 5.4L 4V Stage 3 Valve Springs" is in sale since Tuesday, March 12, 2019.
This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "modularheadshop" and is located in Casselberry, Florida. This item can be shipped worldwide.