C7 Corvette High Flow Cats
Thread Starter
3rd Gear
Joined: Jul 2025
Posts: 3
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C7 Corvette High Flow Cats
Hey, I've recently did a muffler delete and it barely increased the volume. Those who have high flow cats, does installing them make the car noticeably louder? Is the smell still acceptable? Also, does installing high flow cats cause a CEL?
My other option is getting a X-pipe to get rid of the secondary cats, but I'm wondering if it really makes much of a sound difference.
I'm from Canada so no smog or no yearly checkups.
Thanks in advance!
My other option is getting a X-pipe to get rid of the secondary cats, but I'm wondering if it really makes much of a sound difference.
I'm from Canada so no smog or no yearly checkups.
Thanks in advance!
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From: Pittsburgh
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Most aftermarket "high flow cats" are inferior in quality compared to the oem cats ( you get what you pay for). If you are looking for more sound, long tube headers would help. I would advise you not to go completely cat less as you may indeed get that rotten egg smell at stop lights
Le Mans Master
Joined: Jun 2019
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From: Loveland
I installed the EOS X-pipe. It replaces the secondary cat's. It does increase the sound, but not to crazy. Easy to install, not that expensive, and can be returned to OEM.
https://extremeonlinestore.com/produ...gaAvR3EALw_wcB
https://extremeonlinestore.com/produ...gaAvR3EALw_wcB
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I would start with a cat-less x-pipe. Leave the primary cats in-place, will cause more problems than it's worth IMO.
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I agree about leaving the primary cats in place. Just get a decent x-pipe which hopefully would give you the sound you are looking for from the car.
