[GONIF]

Expensive is relative . I think you could get the heads ported for around $800.00 should get you another 30 or 40 hp ,and from there on it is going to get REAL EXPENCIVE . A 100 shot of laughing gas would work ,but it is very rough on your motor, drive train and in the end your pocket . And you better get the tune right .And as always ,when the bottle is empty the fun is over.