I am doing a ls1 t56 swap and am using the 1 3/4 stainless works long tubes money is running low and i am going to use a flowmaster merge to single 3in over the axle in stock location to summit 3 in inlet and 3 in outlet turbo muff. Has anyone ever used these on our cars any xperience with flow compared to dynomax magnaflow or aerochamber just curios thanks!!

 

That turbo muffler is a similar/same design as the Dynomax Super Turbo and Thrush Turbo muffler. They're a pretty good flowing design that's only a little louder than stock. An alternative for the same money would be a Thrush or Summit chambered muffler (Flowmaster clone).

 

Thanks jim i think i will stay with the turbo style in hopes that it will flow better than the chambered design

 

I picked up a pair of them for the '57 about 5 years ago. Unless they've changed since then, only the pipe flanges are 3" - the tubes inside the muffler go to about 2-1/4" before the perforations start. Extremely disappointing. Sounded good (really, really nice, IMO), but were too restrictive.

 

well i noticed summit had 2 diff part #s for the same outlet size and orientation with closer inspection there was a notation that one muffler had 2 1/2 in internal and 3 in xternal i wonder which one you had?

 

They only had one like that at the time, so it must have been the 2-1/2" one.

Hmmm, maybe I'll order up a pair of the other ones. . .

 

eewwww recieved my summit turbo = its goin back tapered down to at least 2 1/2 in in perf core orderin up a 3 in hooker maxflow goin to see what happens. I shoulda listened to ya five7!!