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Originally Posted by goofygrin
FI: You might take a look at what Ultimate Racing does to their test pipes and high flow cats. They angle the o2 bung in order to reduce the airflow over the o2 sensor, eliminating the need to an antifouler fix.
Now, I bought my Evo's HFC before the fix and a $2.50 drilled out spark plug antifouler fixed up my CEL. Well, for the most part. I threw a different code when I rode the rev limiter way too long at an autocross (doh!).
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Ultimate racing is not sure they will fit. They have only sold and installed them on 350Z and G coupes..