I've looked and I haven't found anything about porting and polishing the factory head. I'm sure someone has tried it.
Since I've decided to keep the 2.5 in place and since I have to tear off most of the engine top accessories anyway I thought about doing a little polishing and port matching. Has anyone done this and had a positive result?
I'm also considering freeing up the intake and exhaust (I think the header may have a hairline crack) a little but I don't want to lose my low end. Any pertinent advice?
Since I've decided to keep the 2.5 in place and since I have to tear off most of the engine top accessories anyway I thought about doing a little polishing and port matching. Has anyone done this and had a positive result?
I'm also considering freeing up the intake and exhaust (I think the header may have a hairline crack) a little but I don't want to lose my low end. Any pertinent advice?
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