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Downshift Backfire!! after chip mod....
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05-23-2013, 11:14 AM
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sylonien
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Drives: M3
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Old thread, but mine pops when I lift off (like every single time) in the exhaust.
And especially during cold starts.
I love it but no one elses seem to do it?
Pops like mad when I lift off with my modded x-pipe/backbox.
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