I grew tired of the Dynomax superturbo mufflers that came with my 2.5" TTI exhaust. After some measuring and correspondence with Ron at Spintech mufflers, I purchased 2 Spintech Pro Streets #6334. These have a headpipe/tailpipe offset similar to the DynoMax superturbo #DYN17733 supplied by TTI (within 0.25"). The overall length is close as well. This worked out great and the tips fit nicely within the valance cutouts. I did have to have the TTI head pipes and tail pipes shortened a little, but it was worth it. I'll try to get a clip of the mufflers this weekend if it stays dry. Just thought I'd post this for anyone looking at getting a different sound from their TTI pipes.