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I bought my Euro headers from Donovan probably about 3-4 years ago. That paired with DKF S pipe and RPI mufflers, the car sounds glorious but the power bump came mainly from the catless headers.
Free bump!
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2014 BMW X5 Sdrive35i F15
2011 BMW 328i E92 LCI
2006 BMW Z4 M Roadster E85
2013 BMW S1000RR K46 R.I.P. 
1998 BMW Z3 Roadster 1.9L E36 SOLD |