a straight pipe in place of the back muff on my 350sdl. it sounds like a baby cummins. not too bad though. i cant feel any difference in performance and i imagine that i might get a half mile to the gallon better economy, cant tell for sure though.

i like it, but when i get read y to sell i will put the muff back on.

i did the same with my 500sec. there the sound is much better. love the growl. also feel half to one mpg better.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.