chaze1385 Posted January 7, 2007 Report Share Posted January 7, 2007 I go to a nuts and bolts supply store and just find a nut that it will screw into. weld that on. You can also use those Spark plug non foulers. Auto parts store will know it is. Drill it out and weld it where ya want it here is a link to a right up on using them as O2 simulators. for those that remove all the cats. It basically restricts the amount of exhaust the rear O2 will trickiing it into thinkin the cat is still there. All the Subaru and Mitsu guys do it. Non Fouler02 trick http://www.msprotege.com/forum/showthread.php?t=123634664Chad Link to comment Share on other sites More sharing options...
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