HELP ecu tune with high flow and catless!
I was install rpi catless x-pipe with catless ecu tune.
and I changed my exhaust with highflow cat x-pipe..
so...
catless x-pipe ecu tune is fine with hfc x-pipe??
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2012 Jet Black e92 M3
2008 Sapphire Metallic Black E92 335 - SOLD
Last edited by jkim1818; 05-01-2014 at 12:02 AM..
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