Nitrous Heads - 910 Autocraft

51mm (2.008") Intakes x 44.45mm (1.750") Exhausts

Raw casting with minimal machining (another set for comparison)...

Drilling for valve guide location...

Reamed for guide size and spring pockets cut...

Head stud washer location spot faced...

Heads stud holes and locating dowels bored...

Combustion chambers of 2002 race heads (They were on car when it ran 9.35 @ 145mph.)...

Combustion chambers of a set of the "new" Autocraft heads (for comparison)...

The three different heads side by side...

The two new heads and one of the 2002 heads...

A close up of the 2002 head (Flows over 300 cfm on intakes)...

Rocker arm mounting location machined...

Extra weld for above...

Pushrod tube oil seal machining...

Heads & seats machined for seat installation...

Seats installed and rough cut, ready for port work!...

Almost done!...

Finished and ready to install!...

Valves, etc!...

Spec sheet on new heads

Intake manifolds...

Intake manifolds finished with nitrous nozzles and map sensor ports installed...