Info on 90/90 results.
After swap went 457.3/423.9 through a 12 bolt/4.56's on 28" slicks.
Gained 23rwhp/7.9rwtq with the 90/90 on a smaller cam than you're running.
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Do any of these guys with the high gains have a4 cars? I am wondering for myself.
It was worth .16ET/2MPH on my Car....
I also ported mine mysef.
I wonder how much affect that the porting had. I am thinking of picking one up but I am not sure 10 hp is worth it at this point. If you got more like 15-20 it would make a difference.





