I personally like this one:

http://youtube.com/watch?v=auWiAhz3oqE

or

http://youtube.com/watch?v=Vqjz_22SGVU

Oh wait we are talking for the Blazers. I like the Flowmaster 40S the best i think.

 

I know it's on an S10, but it should be pretty close. I was gonna say this, but then read that he cut out the cat. Don't know if the same sound can be achieved with a cat...

 

I think that flowmaster sounds pretty good with the 4.3. I have a flowmaster crossflow (camaro style) muffler on my blazer http://youtube.com/watch?v=8bBKnRbm67E and it sounds pretty good. I still have the cat. conv. It has a nice deep tone at idle and sounds great when you get on it!!

 

I actually watched your clip after I searched "Blazer Flowmaster". What does it sound like outside the garage?

 

I will record another clip later tonite and post it

 

I like my exhaust.. http://media.putfile.com/exhaust-70 ..

its a dual chamber resonator where the muffler was, everything else is stock.