I agree that is one cool sounding exhaust! It's a single pipe exhaust but the pipe is pretty big if I recall right, 3" maybe? Someone was reproducing the "S" muffler last I looked, but not the resonator tip at the end of the pipe. Is that available now too? Thanks, Gary H. Don H. wrote: ... > After I get the new motor built for it (a genuine 273/235 horse motor), > my > plan is to do a Formula S exhaust system. The first time I heard one (a > > loooooong time ago), I fell in love with the sound.... ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.