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Question about resizing exhaust

Old Apr 27, 2005
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Question about resizing exhaust

I was wondering if anyone has ever resized the inlet of a muffler from 80mm to 60mm. The custom shop said they can make it smaller and adjust it down, is this okay?
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Old Apr 27, 2005
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its fine, i dunno about mm diameter, but i had my piping shrunk from 2.25" to 2", to get a cat on it to pass smog. This will hurt ur performance tho.
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Old Apr 27, 2005
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How come? wouldn't it just be like the smaller size inlet? I'm going to be going from 3" down 2.25, how bad will it hurt?
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Old Apr 27, 2005
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3"?!??!!? im hoping u have a turbo to be runing that big of exhaust piping, cause that size piping on any car that doesnt have huge power is just MURDERING ur torque and horsepower... ur 1st goal should be to get rid of that size piping and change EVERYTHING to 2.25".

re-reading the original post... Is your Muffler size 3" or ur piping 3"... if the muffler is 3", and piping is 2.25"... and yes making ur muffler smaller to fit the piping would be VERY smart, u wont see any power gains, but u can still use the muffler. If u have 3" piping... get rid of it.
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Old Apr 27, 2005
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No i don't have 3" piping, I knew not to ever run that unless I have Turbo, but the pipe was a steal and couldn't pass it up, cause the shop told me I could resize the inlet of the muffler. Its the Tanabe Tuner Medallion. So it will be like I just but the 60mm?
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Old Apr 27, 2005
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Does anyone think this will be a problem or should it work fine now that I'm going to resize the inlet to 2.25?
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Old Apr 27, 2005
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it will work fine man.
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Old Apr 27, 2005
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you'll be fine, i ran 2 1/4 in my EX for yrs....its the perfect diameter
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Old Apr 27, 2005
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You think the muffler will look funny on the car, it doesn't have a body kit on it yet. can it tuck up there so it doesn't hang down and see the entire muffler.
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Old Apr 28, 2005
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Will the muffler tuck up underneith the bumper or will it hang low and look bad?
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Old Apr 29, 2005
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all depends how u get it mounted. at shops then can weld it on any angle u choose( within limits tho), so just be there when they are installing it and direct them on how u want it. U also might want a little piece made to get it to exit on an angle to the side, or a vertical angle, which they will have to modify ur stock exhaust to do, but can still be done for relatively cheap.
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Old Apr 29, 2005
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Is there any adavantages to installing it at an angle? Or just for looks? my stock bumper has a dip in it where the exhaust goes, would mounting it at an angle look bad like it wasn't supposed to be there.
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Old Apr 29, 2005
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alot of people jsut think it looks cool, but there is no advantage. u can always make it fit that stock hole too, just dont get a 5" tip thing and u should be fine, it should also be able to come out on an angle with a hole already cut,.
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Old Apr 29, 2005
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Yea i like it too, it has the 120mm tip on it, 80mm inlet but I'm having it sized down to 60mm.
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