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Old 03-01-2012, 01:40 AM   #1
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cats

Should I cut my cats off ? I got a 40 series flowmaster on my car and it has stock shorty headers
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Old 03-01-2012, 07:34 AM   #2
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Not unless you bypass your o2s I was getting 11 mpg cause I was missing a cat, it sucked
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Old 03-01-2012, 09:46 AM   #3
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Re: cats

EVERYBODY has an opinion on this, here is mine-
You want to have at least a set of hi-flow cats in place. It's legal that way, you keep some low end torque that way, and it helps with improved exhaust tone in my opinion.
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Old 03-01-2012, 11:30 AM   #4
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Are you planning on not passing smog? Because if u take em off u won't
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Old 03-01-2012, 12:45 PM   #5
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Quote:
Originally Posted by robb15033
EVERYBODY has an opinion on this, here is mine-
You want to have at least a set of hi-flow cats in place. It's legal that way, you keep some low end torque that way, and it helps with improved exhaust tone in my opinion.
+100 listen to this guy he knows his stuff
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Old 03-01-2012, 01:42 PM   #6
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Quote:
Originally Posted by robb15033
EVERYBODY has an opinion on this, here is mine-
You want to have at least a set of hi-flow cats in place. It's legal that way, you keep some low end torque that way, and it helps with improved exhaust tone in my opinion.
+1 much smarter to go with highflow cats than no cats. Some people just don't want to pony up the dough for hiflows as they can be pricey.
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Old 03-01-2012, 01:53 PM   #7
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I'm not to sure about our cars, but modern cats are actualy very efficient, on like Realy old cars people would cut the cats and free up horsepower from easier exhaust flow, but I think it's just a trend that carried over, modernized cats really shouldn't hold you back that much, again I'm not completely sure, please correct me if im wrong.
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Old 03-01-2012, 02:01 PM   #8
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Originally Posted by Surffer227
I'm not to sure about our cars, but modern cats are actualy very efficient, on like Realy old cars people would cut the cats and free up horsepower from easier exhaust flow, but I think it's just a trend that carried over, modernized cats really shouldn't hold you back that much, again I'm not completely sure, please correct me if im wrong.
You pretty close, they are not nearly as restrictive as they used to be.
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Old 03-01-2012, 03:37 PM   #9
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Horsepower would be a plus but I'm just looking for a good sound without spending a bunch of cash
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Old 03-01-2012, 04:30 PM   #10
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If you want good sound keep your cats, do a dual exhaust a mid pipe and a couple good chambered mufflers. If you decide to spend more do longtubes.
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Old 03-01-2012, 05:21 PM   #11
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Re: cats

Yah I agree with what has been said so far...

You really do want some sort of cat on the car...v6's with off road midpipes sound good at idle and below 2500rpms, but above that they get too high pitched/loud for me, not to mention you won't pass emissions.

As said hi flows are a good option but can be pricey...so if you want to save money keep your stock cats and add chambered mufflers...you free up some hp by better airflow and have a louder than stock tone.
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