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Old 08-14-2018, 01:28 AM   #1
Kay i Dee 805
Scooby Newbie
Member#: 487622
Join Date: Jun 2018
Location: Oxnard, CA
2007 WRX

Default High flow cat vs cat less

Hi guys,

I have a 07 wrx with an Invidia cat less down pipe. I can't have the smell of gas anymore since I have a baby on the way. What are the pros and cons on a high flow cat vs a cat less? Will a high flow cat cut down on the gas smell and will it affect the performance?
Thanks guys
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Old 08-14-2018, 01:34 AM   #2
Commander Keen
Scooby Specialist
Member#: 319157
Join Date: May 2012
Chapter/Region: MAIC
2012 Impreza 4DR 5MT


At the very least, run a 2-way racing cat.

Performance penalty is negligible and the exhaust is odorless.

Nobody should be going catless on public roads.
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Old 08-14-2018, 10:01 AM   #3
Scooby Newbie
Member#: 455248
Join Date: Sep 2016

As mentioned above, the difference in performance between the 2 is almost negligible.

It'll be better for you, your baby, the environment and whoever is driving behind you.
Plus, I think the car will actually sound better with a cat.
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