Stage 4 RZR Head rzr A must for upgrading your

A must for upgrading your AMG M157's engine and pairs with any Darton MID Sleeved Block

meticulously performed by our expert technicians in multiple phases

including Turbo Max and Turbo R

Offset fin on both water and air sides of the core for rapid heat transfer

this is a must have for your next build if planned on increased power levels

Stage 4 RZR Head rzr A must for upgrading yourStage 4 Big Valve REQUIRES CORE CYLINDER HEAD CNC Ported Runners & Chambers Bronze valve guides honed to precise tolerances Performance Newen 5 Angle Radius Valve seat profiles Surfaced to single digit Ra's Assembled and blueprinted Hardware Included: BC Intake and Exhaust (inconel) Valves BC Beehive Spring kit with chromoly retainers New Valve Seals New Valve Locks