Fully in house ND ported cylinder head, We have been porting our own heads for well over a decade. We produce the best heads on the market with the best results………just look at our demo cars for proof!

The procedures included in this S4 head are as below;

– Port, polish & blend
– Modify combustion chambers & balance volumes
– Fully de-burred
– Skimmed surface
– 3 angle valve seats

Parts included with head;
– ND valve spring kit
– ND shim set
– ND Ti retainers
– ND 1mm oversize inlet valves
– ND 2mm oversize inconnel exhaust valves
– ND bronze valve guides
– ND solid lifter camshafts (Pair)
– ND solid lifter set
– ND vernier cam pulleys (Pair)
– New high temp valve stem seals

(Suits stroker engines best) (Rated up to 950hp)