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I'm catless with 800+rwhp.
Cats routinely fail above 650rwhp.
Corsa double helix X-pipe quells the rasp and it is full stealth with the butterflies closed on the muffler.
No smell issues either as there is an E85 station 3 miles from my house.
Last edited by Rlhay2; 08-28-2019 at 01:35 PM.
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