There is no exhaust after the cat so not sure how much it effects it like that. I guess I could experiment with a piece of pipe easy enough thanks. I didn't touch rear suspension adjustments just a bunch of positive on lt front and negative on rt front. I swapped brake bias front to rear one night and it was the cats meow, the rear set perfect in corners with the lightest tap. The quick avoidance situations made it difficult to control so I swapped back.