Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

Any downsides to muffler delete?

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Old Aug 15, 2010 | 02:12 PM
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bugeye90's Avatar
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Any downsides to muffler delete?

I was just wondering if there are any adverse effects taking the muffler off can have. I know turbo engines don't like alot of back pressure but will this cause loss in power at all?
Old Aug 15, 2010 | 02:35 PM
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Cops will be all over you. It sounds nice though. But you will have cops pulling you over all the time
Old Aug 15, 2010 | 02:38 PM
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Yeah downside is lots of tickets and the like. I am not an expert but I think a 3in exhaust with catless dp is more what you are looking for instead of taking your muffler off. But then you can till get popped. Throw a hi flow cat in there and you would be good, I think
Old Aug 15, 2010 | 02:41 PM
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Originally Posted by irish_car_b0mb
yeah downside is lots of tickets and the like. I am not an expert but i think a 3in exhaust with catless dp is more what you are looking for instead of taking your muffler off. But then you can till get popped. Throw a hi flow cat in there and you would be good, i think
+1.
Old Aug 15, 2010 | 02:41 PM
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Also in my reading I think you want a little bit of back pressure, I think if you completely elimnate all back pressure that is not optimal
Old Aug 15, 2010 | 03:03 PM
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Well I have a high flow cat on dp and a resonator would that be enough back pressure?
Old Aug 15, 2010 | 03:05 PM
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just loud
Old Aug 15, 2010 | 03:07 PM
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well maybe i can just get a straight through axle back
Old Aug 15, 2010 | 03:08 PM
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If you delete the muffler and have no cats, you'd better be sure to replace it with a straight pipe that extends out past your bumper itself, because you'll have a lot of fireballs and extreme exhaust heat. I've seen many a fool with a muffler-less Civic who's rear bumper skin is a scorched mess.
Old Aug 15, 2010 | 03:11 PM
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I have one high flow cat
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