high flow t600 muffler

if it's the same thing as the w9. like yours it was one muffler under the cab.

design wise i didn't see any difference on the insides between the high flow and stock mufflers. only difference was shorter length.

saw no difference in fuel mileage. but that truck ran mostly westerner mountains.

 

Donaldson # M-100463 is their high flow muffler, the same one for the Pete's just a year less warranty when mounted horizontal, you can use the same brackets just change to 10" bands. I got my bands from my local KW dealer, TruckPro and Ryder have the best price on the muffler.

 

I have twin stacks on my Star and I replaced them with the 463 Donaldsons. They sound great (to me!!) and it seemed to rev easier but I didn't really see any gain in mpg. The power did seem to improve a bit (might be all in my head) with the old Catalytic muffs, it has to be an improvement.

Bill

 

100463 are longer than stock, the flex from the muffler exit into the upward turning elbow is eliminated, but that's not a problem. Been running with two underneath my t600 for about 3 years now no problems, great sounding muffler deep tone. Will probably be much louder with a single 5" stack.

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I put 463's on alot of the under exhaust trucks. The catalytic muffler is larger in diameter. Just take floor jack under existing brackets and jack up... If you watch your placement and alignment you can bend them up just perfect to cradle the 463's RW

 

that's what I did then shortened the stainless steel bands that hold it in place.