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Hey, I've got a header back OBX Racing exhaust system. 06' Tib 2.0 5-speed. I really like the system, noticable power increase, and a nice non-ricer sound. But at about 3500-4000rpms(most of the time in 3rd, 4th, or 5th gear) I get this terrible resonant sound. Trust me i can handle a loud exhaust but its deffinatly abnormal. I've dynomatted the trunk area and I've put iso-barriers between the body & muffler/tips to insure there is no contact between the two. It really puts a considerable amount of pressure on the ears. Any other RPM range it sounds kickin. Any help or pointers?
 

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Magnaflow Catalytic Converter
 

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ViolentB said:
Magnaflow Catalytic Converter

idk how that will help might even make it louder. i guess it could make it raspier and make it alil less annoying? dont turbos make ur exhaust alil quiter? hahaha try that
 

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idk how that will help might even make it louder.
How is adding a cat gonna make the car louder ???????
Cats add fluff to the exhaust to quiet it as well as pass inspections.
 

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ok then my only other suggestion would be maybe some silencers ?
Cause everything else I can think of you've done, the dynamat, and cats are out of the question.
 

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