Supertech Dual Valve Springs for the 4G63 Engine.

Supertech Valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance & durability at high rpms and better memory.

Computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue for long durability under extreme conditions.

These are a “must-have” for running high rpm and/or high lift/duration camshafts.

Specs are as follows: 96lbs.@39.60mm lift

247lbs.@11.5mm lift

****Priced at a set of 16—Spring Seat Locators (Part # SEAT-M1007D) are required for this set, NOT included at this price****