Put a 2001 B18c1 in the hatch this week, and the GSR "header" was too short to reach my stock 94' Si exhaust. I welded in an extenstion just to get me by for awhile till I can afford a new exhaust. I picked up a cheap Greddy header, and it is even shorter than the GSR "header". Also, the Greddy header doesnt have the O2 plug in.. I was thinking about getting either a high flow cat, or test pipe. I need something with an O2 housing, and the "longer" length to meet up with the Greddy header.. Any Ideas on what high/flow cats I could use that would be long enough? I may just end up getting something totally custom made up, but I kinda want something to get by without spending tons o' $$$$$ Other than that, swap turned out great!