Dar,

Thanks for the help! If I decide to go with the tuned silencer (not the pipe), does MVVS manufacture a series of header extensions, or am I going to find that I have to have several fabricated and then have to test each one for performance? I am pretty new to this (only an Irvine .53 in the hangar right now), so I think it might be a little more challenging for me than a seasoned vet. What do you think?