I hear you. I am nuts and will check/recalibrate the MAF even when I just change the TB. So that's not an issue. I wanted a new air filter anyway, seems like the same as when I started with the exhaust, wanted to change one thing and ended up replacing everything.
75 dia, pi*r2 = 4418 less throttle rod area (730) = 3688
You'll need to change the 2950 to 3688. Many users have reported better results going even higher. We have tested numbers ranging from 3775 to 5500 without issue.
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