Included in this listing is a pair of stage 4 Merlin cylinder heads for the Rover V8 engine. Created from 25 years of flow bench studies and now machined in-house by RPi engineering from ultra high-grade, high density billet alloy on our very own V8 powered 4 axis CNC machine. This is truly the ultimate fast road Rover V8 cylinder head, with valves repositioned for best flow and angle, larger ports designed for most efficient air flow and speeds, additional supports for the rocker shaft assembly and more to allow for huge gains in torque, efficiency and power. As if that wasn't already good enough, these will also be supplied…