single v. dual exhaust question

[galoolie]

Is there any reason beside cost that GM used single exhaust pipes on my 71 Burb? Is there more torque?
Is dual exhaust always better?
I use my truck to 4 wheel (slow speed) and pull a small trailer....could use a few more ponies on the highway while towing.
Thanks

[SoCal71K20]

You will get different arguments on this one.
My 71 4x4 pickup came stock with a skinny
2 1/4 pipes going into a single 2 1/4 muffler
and tail pipe.Real restrictive looking setup.
I then changed out the muffler to a single
2 1/2 in 3" out with a 3" tail pipe,all this
with stock manifolds.Little better.Since then, I have installed vortec heads and run
hedman hedders that dump into 2 1/2 pipes that connect to a single walker dual inlet,
3"' single outlet muffler.I did this so I can
still use my 3" tail pipe.Alot better.I just
didn't want to spend the money getting another tail pipe bent for duals.Runs well
like this.Maybe in the future, I will try dual setup with 2 1/2 pipes and mufflers and
cross over pipe.

[Longhorn Man]

Try to run around the block only breathing through a coffee stirer. Then try it with a straw from Burger King. Bigger is better. The more you get out, the more room you have to let more in.
On the flip side, it IS possable to go with too much, and hurt performance. For a stock set up, I would go with some 2 1/4 inch dauls, cross over or none, it helps torque a little if you have it.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
E-mail longhornmail@yahoo.com
My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough?
Columbus Ohio