[Perf. Eng. Eric]

I will try to post the graphs on Saturday or Sunday. Here are the peak numbers. Fist run with original stock mufflers. HP 431 and torqe 417. After the new mufflers were installed, and we re-jetted to get the air fuel back to the original settings. HP 451 and torque 435. This is on a 408 windsor with AFR 205 heads and a victor jr intake manifold. 825 carb. and a hydralic roller with around .600 lift. RedBarchetta, I think our muffler is almost the same as the muffler you are talking about. Hope this helps.