I was catless for a while until I just couldn't deal with the smell anymore. I went with a rather expensive set of Cats though. Vibrant Gesi green cats.
https://vibrantperformance.com/catal...358354e5ec019b
Quote:
GESI UHO-Series Catalytic Converter, 3" Inlet/Outlet x 4.5" O.D. x 7" Overall Length (rated for 500-850HP)
- Capable of withstanding up to 1500 deg F
- Ideal for forced induction applications, with no loss of HP
- Covered by a 5 y
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I'm not sure how these compare to the kooks green cats though but I spent a good bit extra because these seemed to be a much higher quality.
Also, I recently got setup with a Flex Fuel tune so now Im thinking the smell probably wouldn't bother me. On E85 I'm probably closer to 650 rwhp.