Ok I'm making a track car for road and autocross out of my 05 it's just a base not a V but it's got a billy boat set of bullet tail pipes and H pipe I'm finishing it up now and could use about 3 inches of room to get a nice set of duel electric cut outs to fit in that little pocket at the front of the tunnel behind the oil pan. I was thinking headers and could uncork on the fly or at the track I just may have to loose the cats, and I hate to do that, but it is going to be a fun weekend racer only so it may have to be catless, oh well lol.Thanks for the info!!! If anyone hears of a nice set, or a set of stainless steel headers anyplace that fit a Northstar base 4.6 or XLR V 4.1 drop me a heads up. I'm out busting knuckles.