Evolution Racewerks N20 downpipes remove the exhaust flow restrictions caused by your stock cats. ER F10 N20 DP will allow your turbo to spool faster and keep maximum boost longer. On top of the performance gains the Evolution Racewerks F10 chassis N20 downpipes will upgrade the exhaust tone of your BMW. Use the ER F10 N20 DP with the jb4 and expect and extra 35 whp and 60 wtq gains.
Ceramic coating: keep the heat from the exhaust from gassing out and reduce back pressure.
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