As stated in the title, I have a 2.5 inch inlet/outlet center/offset tipped Thrush turbo style muffler. It has free flowing chambers for sound deadening, while maintaining good exhaust flow. I dynod at 180whp/130 wtq with this muffler, while still maintaining a very quiet, somber sound. First $20 bill takes it. Willing to meet up half way if needed. Bumps = rep! Need to clear garage space!