Hey if anyone knows how to make a "test" cat converter aka... piping that can bolt up to my downpipe and my thermal full cat exhaust, IM me on AOL sn = zivicase10287 if you can make one that will bolt up to my shyt then IM me or if you know of a place to get them (doubt it) post the site here please, OR if anyone can tell me how big the opening in a stock 91 hatch si cat is.. i wanna slide a pipe through it so i defeat the cat converter but i dont' know what size pipe to get.... if anyone can help that would be great! thank you!

 

I bought a straight pipe off ebay for about $20 shipped...that was a few years back though.

 

If you ask nice, just about any muffler shop can fabricate one for you. All it is is a peice of pipe with flanges welded on both sides, it should be cheap.