I have a 1996 Impreza MT EJ22. I don't have the car, just the engine. I am looking at converting it to dual port exhaust but have a few questions about it:
1. Will any heads from 1990-1995 be a direct bolt on?
2. I know early cars didn't have EGR but Is there any difference between heads from a AT vs MT car that would prevent me form using AT heads?
3. I think my current engine has Roller Rockers and HLA. What do most 1990-1995 heads have and should I swap these over during the conversion?
4. Would EJ22T heads work or should I stay away from those for my purposes? Is it easy enough to block off the oil ports on the passenger head for non-turbo applications?
Any help would be much appreciated.
Thanks.
