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o2 defouler
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  1. Focus ST Discussions
    Hey guys, I’m Tyler new to the forum, been reading this forum and using it for questions and troubleshooting since I bought my ST in 2016 Im looking for input I recently installed a JBend Defouler with the medium bung on my ST, installed facing the vband,I run the MBRP Catted Downpipe, Stage 3...
  2. Focus ST Purchasing
    Which o2 defouler actually works and fits with the downpipe so I don’t have fitment issues on my ‘17 fost.
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