Exhaust on 05 GMC

[rondun]

I had to take out my cats due to being pluged the truck runs better, But the stock muffler makes a horrible sound around 2500rpm like the muffler has a broken baffle inside, Anybody know of a good muffler that is not too noisy and flows well 05 GMC 5.3l aluminum block w/6.0l heads and 9.9to1 comp on propane and 4:10 gears truck pulls well (eats a Hemi in a pick up) and gets 19mpg the exhaust was quiet until the cats came out NOT NOW

 

[blastoff]

Go to the local muffler shop should be approx. 150.00 install I would think or less.

 

[grizzley1]

best bet is a local muffler shop

 

[drford]

I had to take out my cats due to being pluged the truck runs better, But the stock muffler makes a horrible sound around 2500rpm like the muffler has a broken baffle inside, Anybody know of a good muffler that is not too noisy and flows well 05 GMC 5.3l aluminum block w/6.0l heads and 9.9to1 comp on propane and 4:10 gears truck pulls well (eats a Hemi in a pick up) and gets 19mpg the exhaust was quiet until the cats came out NOT NOW

pm me i could get you high flow performance cats for approx 250 each they are the answer if you want to make truck quiet again

 

[rmksledder]

super 40 flowmaster i have on my 03 1500 gmc sounds good not to loud

 

[mxz sledhead]

For sure on the flow master if you can give up weekend day you can buy a
complete flow master pkg install your self .go for the stainless pipes and that
well be last pkg you will ever need.Mopac in edmonton has the pkg.