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      08-27-2021, 12:21 AM   #55
iviegatron
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Drives: G80 M3
Join Date: Jul 2021
Location: Richmond, TX

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There are two race versions of the exhaust, axle back and secondary cat back. Then there are two sound files. Which sound file corresponds to axle back and or secondary cat back?

Does the axle back connects before the resonators?

And does the secondary cats back version connects before the secondary cats?

If the answer is yes to both questions above is this just simply a muffler upgrade?
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