2004 Silverado 5.3L Corsa Pro Muffler with and without cats comparison.

2004 RCSB Whte 4X4 Silverado
Stock 5.3L/4L60E
S&B CAI
Stock exhaust manifolds
Stock y-pipe with catalytic converters vs. cats removed
Single 3" pipe from factory y-pipe into Corsa Pro muffler to 5" tip behind right rear tire
Universal Corsa Pro Series muffler
Corsa P/N: CP300CT

[@irishuwould5185]

Corsa extreme with long tube headers with cam and high flow cats is the best set up. I love that corsa on yours

[@johnmalone4101]

Better with cats

[@mattofearle]

@@johnmalone4101 catless is definitely not clean sounding at all.

[@214deleon4]

Part number for the exhaust tip?? I have the same set up, corsa universal muffler and cat less with 4inch corsa tip. This is insanely louder than mine

[@mattofearle]

Wesdon WBOSS50012-300-RS-SS

[@brandonplatt9315]

The one with the cat is it a cat back system?

[@mattofearle]

No. Homemade.

[@ej1025]

Sounds more open and raw without cats How do you like the Corsa Pro compared to the ATAK? This Corsa seems louder and higher pitched to me.

[@mattofearle]

It is definitely more open and raw but un-clean without cats. The ATAK and Corsa are both loud and have the clap but Corsa is louder but higher pitched and a tad more refined. I just uploaded videos of the ATAK with an equal length y-pipe I made to reduce the clap and clean the sound up a little. The truck now has the shortest Corsa Pro resonator on it, and it's probably as good as it will ever sound without long tube headers.

[@ej1025]

​@@mattofearleIs the ATAK still your favorite? Good on Corsa for releasing these universal mufflers. I ended up buying the ATAK for it's deeper tone awhile back, saving it for another truck.

[@mattofearle]

@ej1025 it just depends on the vehicle but it is at the top for sure. Corsa also just released a large universal muffler that looks to be the same one in their full kits for these trucks.

[@mondo9.2.5]

liked the first clip best