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  1. Exhausts and Downpipes
    This is a dumb question but basically I’ve been tuning my car for a while and it’s running great for stock (running MAF). I am going to get bolt ons soon starting with a full exhaust and was wondering if the AFM is tuned already will it need to be retuned for the increase in air flow? or is it...
    catless hondata
  2. Wanted Section
    Anyone selling a full race catless downpipe for civic si? I been waiting on this backorder and its been two months its getting ridiculous. Im still open headers and i cant wait any longer.
    catless civic si downpipe full-race fullrace
  3. Mechanical Problems & Technical Chat
    So I just got a Fullrace 3" catless downpipe installed on my 2013 civic si coupe. Now I know since its catless that it will throw a CEL and to my knowledge if you use a flashpro to disable the "P0420 catalytic efficiency error" then the CEL should go away , right? Well I did that and when I...
    catless downpipe or manifold fg4 fullrace help me
  4. Mechanical Problems & Technical Chat
    Hello guys, I'm new here. I recently purchased a 2013 fb6 sedan. I purchased at 29xxx miles and was previously on a lease. the previous owner did minor cosmetic mods, most which were replaced to stock, however the muffler sounds a lot deeper than normal sis. I'm surprised they didn't change it...
    catalytic catless cel electrical or mechanical engines
  5. Exhausts and Downpipes
    Ultimate Racing Catback Exhaust - 2012 Civic Si Ultimate Racing Civic Si Exhaust Thread...
    2012 3inch brown catalytic catback catless cel civic coming converter coupe or sedan downpipe dynoed exhaust idle install installation installed issues ordered pipe race racing racingsi reviews today ultimate ultimate racing catted 3
  6. Exhausts and Downpipes
    This thread is dedicated to Full-Race exhaust systems for the 9th Generation Civic Si. Please keep information/questions about this particular brand of exhaust system limited to this thread to avoid confusion on the forums and to keep it neat and tidy. Specs: 3" Catback Exhaust System...
    2012 2014 2015 si catback catless civic downpipe dyno exhaust full fullrace install installation loss noise power race reply results review sedan smell stock thoughts video
  7. Bolt-Ons and All-Motor
    im already planning for my mods to the car even before i get it. but since im probably going to be putting nitrous on it im thinking of changing the headers at the same time. is it worth that extra money to get some nice 4-2-1 headers?
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