Exhaust size

DeiselRed · Post by **DeiselRed** » Sat Nov 14, 2009 7:20 am

Hey guys I was wondering if anyone knew the exhaust size of our stock CC's? I think they are 2 1/4 but im not sure. Im looking into a new muffler and want to get the stock measurements right. Thanks

blakeboys · Post by **blakeboys** » Sat Nov 14, 2009 8:55 am

2 1/2" going to the muffler and going out

DeiselRed · Post by **DeiselRed** » Sat Nov 14, 2009 9:02 am

Before the Cat it is 2 1/2 but after the cat it is 2 1/4. from what I hear

killian96ss · Post by **killian96ss** » Sat Nov 14, 2009 11:41 am

The factory exhaust pipe from the cat to the muffler is 2-1/2" and the tailpipe coming out of the muffler is 2-1/4".

Steve

DeiselRed · Post by **DeiselRed** » Sat Nov 14, 2009 12:00 pm

So if i was going for a flowmaster muffler I would do 2 1/2 in 2 1/4 out?

blakeboys · Post by **blakeboys** » Sat Nov 14, 2009 8:22 pm

On my 2002 CC I bought a flowmaster super 44 it was 2 1/2" in 2 1/2" out and it works... sounds damn good without the cats too

killian96ss · Post by **killian96ss** » Mon Nov 16, 2009 11:09 am

DeiselRed wrote:So if i was going for a flowmaster muffler I would do 2 1/2 in 2 1/4 out?

You have several options.

Install a new 2-1/2" I/O muffler and reuse the factory 2-1/4" tailpipe. You will need a 2-1/2" OD x 2-1/4" ID adapter for the smaller tailpipe.

Install a new 2-1/2" muffler and have a shop custom bend a 2-1/2" tailpipe.

Modify a Flowmaster Force II exhaust system for the S10 extended cabs to fit the CC. This is what I did and it worked out pretty good since the extended cab S10 and CC are basically the same. The only downside is the high cost of the system.

Install a new 2-1/2" muffler and buy the 2-1/2" Flowmaster Force II tailpipe separately. The Flowmaster tailpipe is mandrel bent which increases exhaust flow which makes more power than crush bent pipe that almost all exhaust shops use.

Install a new 2-1/2" muffler and dump it (use a turn down with no tailpipe) to direct exhaust gasses toward the ground. This is the easiest set up, but also the loudest.

Buy a direct fit cat back exhaust system. I know Gibson makes one and I'm sure there are others.

Steve

F9K9 · Post by **F9K9** » Mon Nov 16, 2009 5:22 pm

No one has convinced me to change my $180 Flowmaster Delta 40 3" cat back in five years now.

killian96ss · Post by **killian96ss** » Tue Nov 17, 2009 12:54 pm

f9k9 wrote:No one has convinced me to change my $180 Flowmaster Delta 40 3" cat back in five years now.

Nobody is trying to convince you to get rid of it.

If you are happy with it, that's all that matters.
Flowmaster says 3" is too big for the 4.3L, but who cares what the experts say right.
I posted this info in the other exhaust topic.
You didn't really pay $180 for a $90 muffler did you?

Steve

Post by **HenryJ** » Tue Nov 17, 2009 1:30 pm

killian96ss wrote:
f9k9 wrote:$180 Flowmaster Delta 40 3" cat back ...
You didn't really pay $180 for a $90 muffler did you?

Cat back including installation.

The cat is 3" in/out. Not really related but the full size with the 4.3L did get the 3" pipe.