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Newbie: What is best DIY performance mod?

16K views 12 replies 9 participants last post by  CR-Z Canadian  
I'd say two things:

The Fit Manifold transplant, and a muffler delete.

I've done both on my 6MT 2011, and they make a pleasantly noticeable improvement at 3k rpm and above. Both are easy to do at home with basic tools, and can be easily put back to normal if you want.