v6 dual exhaust not "true" dual exhaust?

[greenasgrass]

is it true that it's basically impossible to do true duals on v6 firebirds? [img]graemlins/crybaby.gif[/img]

[Seppo Kaitainen]

No

[greenasgrass]

uh, ok... a lot of posts i have read here have said this, that's why i asked

[Seppo Kaitainen]

Its not impossible. Just that there is no real need, and it probably won't sound too great.

[99BlueSuperSix]

it's not impossible... just not very logical... the single exhaust on these cars is pretty efficient with a good catback, after all LS1's make well over 300 hp with single exhaust... as far as I know I'm the only one on the board that did duals on a v6, sounded good when it was done right, just had to remove it for clearance issues.. any questions you got just ask me...

[greenasgrass]

what is the largest pipe size you can do for a cat-back single exhaust?

[99BlueSuperSix]

4" probably...

[mw02]

But I wouldn't go more than 3"

[greenasgrass]

so 3" might be the best size to go with...

[mw02]

I have 3"....I'd recommend it.

[greenasgrass]

so all the 3.8's i see on this site aren't true duals? [img]graemlins/omg.gif[/img]

[zlightning]

Look under your car and you'll understand.

[97firebird]

A true dual system means each header has its own pipe going to its own cat then its own intermediate pipe and exiting thru a muffler with its own tip. On a V6, this would mean you'd hear a roaring 3 cylinder engine thru each exhaust pipe! [img]graemlins/rofl.gif[/img]

Listen to any GenI Viper with side pipes, and you'll see what I mean.

Our cars have a dual-exit muffler, but it's still not a true dual since there's only one muffler and one intermediate pipe. I'd go with a 3" intermediate pipe for the best balance of sound and performance.

Check out Summit Racing (www.summitracing.com) for the Edelbrock catback for 3.8L V6 ($275). It's going to be your best bet.