Have had a Corsa Sport catback installed on my 2011 6.2 ext cab for about 3-4 months now and this thing is wayyyyy quieter than my old 4.8 reg cab with a Corsa sport catback ever was. I realize these trucks have a third cat and are by nature quieter as far as cabin noise goes, but it is literally probably half as loud as my old 4.8 truck.

Anybody else notice this with Corsa on a NNBS truck? At times almost seems as tho the stock 6.2 exhaust was louder? Actually talked to Corsa about this and they said no one has complained about them being quieter than previous versions. Just looking for more sound without going to cat-less LT's...

 

Delete the third cat and see how you like it

 

That's probably the next step, has anyone done this and noticed a difference in sound?

 

Nobody running Corsa catbacks anymore?

 

i know you said you dont want to go catless longtube, why not do catted longtubes. It would add some volume that way and still be catted.

 

I knocked out the third cat and put a borla sportsman on it and shes just right now. I put the magnaflow on it when the truck was new and I was upset afterwards couldn't tell I'd even swapped the muffler on it. Just did the borla a few months ago and it's just right.

 

i run the corsa sport on my 07 nnbs 5.3 and mine is quiet when i am cruising and at idle but it has gotten a little louder over the past year. dont know if it is breaking in or what but i love the way mine is sounding now.

 

every corsa with longtubes I heard was raspy and loud as ****, but they were catless. Run LT's with cats.