502 Series Performance Type 1 Head Bare No seats

AA 502 Series Casting, It is set up to build the performance Head of your needs. It Comes bare with a 12mm plug hole, and with out Seats or Guides. Giving you the the ability to build any possible combo Street/Drag head you want.

The 502 Series comes with our Stage 2 porting with a modernized combustion chamber for increased head flow & performance. There is a second Full Fin, so you can Fly cut your heads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stop possible oil leaks. Long reach 3/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.

Casting: AA 502

Valve Size: N/A

Head CC: 55cc

Head Bore: 85.5

Plug Size: 12mm (ReplacementNGK Number is D8EA)