The car started out as a 400, with Hedman B body headers because they were cheap, and home built 2 1/2 inch exhaust. When I lost a cam on break in it messed up the entire reciprocating assembly so I stepped up to a stroker kit. I reused everything else from the 400. The car ran close to the break of 11.49 where I would have to put in a roll bar, and I won't do that, that there was no point in stepping it up. Plus I street drive it 90% of the time, so the smaller headers and exhaust fit better and are quieter. In fact I am in the process of replacing the exhaust using TTi 1 3/4 headers and a complete TTi 2 1/2 inch exhaust system with an H pipe and Dynomax VT mufflers. My goal was a car with excellent street manners that could hold it's own at the track, and that's exactly how it turned out.