Ferrea PAC Alloy Dual Valve Springs for Toyota Supra 2JZ 2JZGE 2JZGTE Haltech and the steel material makes

and the steel material makes for a less brittle piece so teeth are not easily broken

Any job can be done with just two of the PHR peel-away shims

but sometimes they still come up short

Hand TIG-welded seams

Ferrea PAC Alloy Dual Valve Springs for Toyota Supra 2JZ 2JZGE 2JZGTE Haltech and the steel material makesFerrea PAC Alloy Dual Valve Springs for Toyota Supra 2JZ 2JZGE 2JZGTE Our take Ferrea's valve springs set the standard for aftermarket performance on the 2JZ cylinder head. The PAC Alloy dual valve spring kit is recommended for any 2JZ utilizing aftermarket camshafts and is our valve spring of choice for any high horsepower, high boost, high rev application. This kit REQUIRES use of Ferrea Titanium Retainer #E11037 and BOTH Ferrea Spring Seat Locator