v3.60PF/SPS
35-48cc chamber
172cc runner
2.265-2.290 intake valve 
1.600-1.650 valve package

Port developed by Darin Morgan for Aussy Pro-Stock.  Speier Racing Heads is the ONLY other USA dealer for these heads.  In testing they made 2.85 hp/cid. 1140hp at 399.8 cid

Bare w/Valve Job, Hand Finished- $5600