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I have catless UEL headers and no turbo and I do smell odor. Odor is most profound if I don't let the car warp up and when I really get on it. I would compare "getting on it" to running boost because both are demanding more . jmust make sure your not mistaking the odor to that of running a catless header. I feel like you should be able to identify an exhaust leak with a review of your fuel trims. Have you all looked at them?
No clue what this ticking sound could be.
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FRS
Current mods: K&N air filter, OFT, OFH, berk high flow cat front pipe, Q300 exhaust, lighter wheels
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