From what I have found, Corsa is the only company that makes a cat-back for the sierra denali. It costs around $1100. Are the performance and asthetic gains really worth it or should I take the stock muffler out and just buy a 3"in/3"out performance muffler and have it put in?

 

just buy a magnaflow for $120 and weld it in, my 2 cents

 

Im enjoying my magnaflow(si/do), real deep tone, little more power(on the butt dyno!) im pleased, oh and it doesnt drone.

 

If you plan on keeping your truck for a long time, I'd say Corsa is worth the money. I've had my Corsa on for almost 4 years and there is no indication of rust anywhere. I lived in humid South Carolina for most of that time too. I've seen and heard of other exhaust companies having rust issues with their catback systems. Just something for you to consider.....

 

Corsa is my favorite, but no way in hell would I pay $1100 for a cat back. That's total B.S.

 

corsa is the only exhaust i would personally run. would i buy it new? no. look on ebay for used systems for fairly cheap. I bought a complete cat-back for $250.

 

Same. I never understood buying a cat-back when all you really want is the muffler.

 

Corsa is worth the money, its build quality is like non other IMO. I have seen a NEW Corsa sport cat-back sale for 182 on EBAY. I hit myself for not getting it then. But again, YES its worth it!

Dustin

 

I love mine, not sure about $1100 though, lol. Like said keep an eye out for a used system somewhere.

 

Worth >$1000 hell no!
Worth <$500 yes

I got mine brand new off Ebay for about $420 if I remember right and you can find them for less than that used or new if you look hard enough.

Best sounding exhaust IMO but I didn't gain any power from it.