GSC Power-Division Chromoly Valve Spring Seats For 4G63T (+ 0.035") (gsc4041) 18210 0L V12 without sacrificing drivability

0L V12 without sacrificing drivability or reliability by optimizing the engine's performance

28" Single Square Rolled-edge Angle-cut Outlet - 10

With in-house manufacturing

Measured Flow: 450 CFM @ 7" H2O

Restrictive bottle valves will no longer be a problem in the nitrous world

GSC Power-Division Chromoly Valve Spring Seats For 4G63T (+ 0.035") (gsc4041) 18210 0L V12 without sacrificing drivabilityThe GSC4041 CNC turned Chromoly valve spring seats are meant for the 4G63 platforms pushing to the absolute limits, with an additional 0. 035 built in, the need for shims and potential wrong stacking of shims is eliminated when higher spring seat pressure is required. Sold as a set of 16. Features: Designed to deliver trouble free, consistent performance Right for your vehicle and lifestyle Made from high quality materials for ultimate durability