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Well E-test hassle is one reason...
The other is that unlike the N54, they haven't come up with a permanent solution for the CEL... The 1 and 3 series have autoclear from the Procede and JB4 N55, but the F10 and E70 series don't have that same setup from the JB3... Until they come up with a solution to clear that CEL (Other than using the Bavarian Technic Tool) using a piggy, then best bet is to come out with a hi-flo catted version that will pass both E-Test and not have a CEL in your face all the time... (i'll answer your PM later tonight or tomorrow)
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BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi)
2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune |