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Exhaust leak help.

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Old 08-29-12, 10:28 AM
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birdmane
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Default Exhaust leak help.

1999 Lexus Sc300.

-4 inch exhaust, single pipe, from the resonator back.

I had it installed at a shop, wasn't sure if it would fit. I told them to install it only if it would fit properly. I took it for an oil change and was able to get under it to inspect it.

Where the resonator meets the new pipe, im guessing its 2.5in resonator outlet to a 4 inch pipe, not ideal sizing, there is a leak at the top of it. You can feel it with your hand, but you cannot hear it while idling or driving.

I spoke to the shop and they are going to fix it, just wondering what the options are. Right now it has a real nice throaty/deep/low growl to it. Would removing the resonator make it a lot more whiny or unbearably loud?

Any info is appreciated.


Only crappy picture I have. Bottom right corner is where the leak is

Old 09-10-12, 07:09 AM
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birdmane
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Any help?

Thanks
Old 09-10-12, 08:14 AM
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SC400slide
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I have an exhaust leak but I don't really care...it will deteriorate your cat's quicker I think...
Old 09-10-12, 09:02 AM
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Ali SC3
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why is there a 4" exhaust connected to a 2.5" resonator? loose the smaller resonator already.
there is no point to 4" piping it you have a 2.5" bottle neck. you would need like 3 step down adapters to weld that thing without leaking. they will put welds on welds, and one day it will crack. make it all the same size, and weld in a high flow cat if you have to. just my 2 cents.
Old 09-10-12, 09:17 AM
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spoolxexo
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Vband flanges, get em!
Old 09-10-12, 01:51 PM
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birdmane
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Originally Posted by Ali SC3
why is there a 4" exhaust connected to a 2.5" resonator? loose the smaller resonator already.
there is no point to 4" piping it you have a 2.5" bottle neck. you would need like 3 step down adapters to weld that thing without leaking. they will put welds on welds, and one day it will crack. make it all the same size, and weld in a high flow cat if you have to. just my 2 cents.

I like the sound of it now...how different will it be without the resonator?
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