Omie01

Agree to the above, If you try to make new holes you will be too close to the old ones and just open them up. Then the screws won't...

I would go with the RPM Air Gap!! I have run the Performer, Blue Thunder, and Air Gap. There is no comparison. The Air Gap out performs...

I have a new set in the box, they look good, but can't say how they fit!!

I also feel there is nothing to be gained by porting. And you will just hurt the value of the heads if you do. My stock heads make more...