catless

  1. typedRew

    Secondary O2 sensors, tuned, still needed?

    On my last car, even though the 2nd cat codes were turned 'off' I needed the o2 sensor installed and plugged in to maintain proper fuel trims, not only did it need to be there but it could not be in a 'extended o2 tricker' housing. Had to be in the exhaust flow directly. I would get +12%-+18%...
  2. BMW 135i N55 | 3.5" LOUD turboback exhaust! - YouTube

    BMW 135i N55 | 3.5" LOUD turboback exhaust! - YouTube

    2013 BMW 135is N55 Black Market Racing 3.5" catback exhaust with custom down pipe (straight 3.5", no Y splits) MHD Tuning Injen Intake Evolution Racewerks FMIC
  3. Mike @ XPH

    PROMO VRSF N54 & N55 Downpipes Lowest Price + FREE SAME DAY SHIPPING - In Stock!!

    www.extremepowerhouse.com Why shop with us? Lowest Price Guarantee: We do our best to always have the lowest price on our website, but if you found an even lower price somewhere else let us know. We will match the other price and thrown in an extra $25 store credit towards your next purchase...
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