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1-6 of 6 Results
  1. Focus ST Performance
    So ive had my '17 st1 for about 2.5 yrs, and I finally decided its time to ramp it up a bit. Ive been lurking around this forum for the whole 2.5 yrs picking up little tidbits for advice and small mods, but finally registered an account this week because its time for some serious work, and I...
  2. Focus ST Discussions
    Hey all. I'm currently in the process of making my own catless downpipe, kind of a "skunkworks" deal. I'm wondering about using an O2 sensor defouler? I am tuned, is there any risk to using a defouler? Should I have my tuner look at a log and provide an updated tune for the catless pipe? Is it...
  3. Focus ST Discussions
    Hey guys my 2016 ST1 currently has a depo catless dp and is fully tuned with JST. I previously had a muffler delete along with a Magnaflow muffler put in place of the stock resonator. While this setup sounded great around town, the drone was pretty bad when driving back to college (6+ hrs) every...
  4. Focus ST Discussions
    I had a catless downpipe for a few months until i decided to go with a sport cat downpipe assuming the cel would go away. I cleared the cel lights on my sct tuner but a few days later it came back. Ive heard if i get a new O2 sensor it might fix it but just wanted some more info before i buy one.
  5. Focus ST Discussions
    I just got my catless DP for my 2013 basically stock st, and am planning on getting it installed in the next couple of weeks. The only thing I've done to it is a resonator delete a while ago, and I really want a loud exhaust. I watched a couple of videos but they don't really do justice on the...
  6. Focus ST Guides
    Hi guys, I recently bought a new cat lees downpipe, mountune intecooler with its Cobb accessport and mountune tune. Just wanted to see if y’all have any advices, recommendations or warnings regarding this upgrades I’m doing to my car. Also, if y’all know about problems that could occur do to...
1-6 of 6 Results