Fast Road/Competition Performance Cylinder Heads for 3.5,3.9, 4.6 and 5.0 litre Engines.
Oversize inlet/exhaust Valves
Stainless 214N Tuftrided Material
1.63" Inlet Valves
1.4" Exhaust Valves
Fully ported & polished inlet/exhaust +
Bulleted Hi-flow Guides
Late type neoprene seals (16)
3 Angle Valve Seats
Uprated Single Valve Springs or duals
Springs Installed @correct height
HD Spring Retainers
Seats vacuum checked, surface finis to lower Ra than factory heads and ultr-sonically cleaned to ensure internal surfaces are as clena as the external.
Please note: Exchange means exchange for same cylinder head type and bolt pattern