Test Pipes vs Mid pipe vs Rear Section HP gains
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04-15-2013, 02:19 AM
BimmerPost Supporting Vendor
Drives: 2014 435I M-sport
Join Date: Dec 2011
Location: Miami Fl
Some exhausts might not give this much but it should be close enough.
Full exhaust around +28 whp
Tune + full exhaust from +40-45 depending on the octane you have available.
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