Low end torque exhaust?

07 Avalanche MODS:,  cai, short headers,  custom tune, cut outs, aftermarket muffler, resonator deleted
Looking for more low end torque.
Assuming I could get a custom exhaust to rob a few more hp

This would be my pick for exhaust.

http://www.corsaperf.com/viewpart.aspx?year=2007&make=Chevrolet&model=Avalanche&partnum=14246&cfg=258


For more torque I would not spend lots of money trying to Frankenstein something together. I would trust a company that designs performance as a tested package and not try to reinvent the wheel :

http://www.magnusonproducts.com/p-73-suburban-avalanche-tahoe-yukon-48l-53l-2007-2010-magnuson-supercharger.aspx

tlrche67 said:

07 Avalanche MODS:,  cai, short headers,  custom tune, cut outs, aftermarket muffler, resonator deleted
Looking for more low end torque.
Assuming I could get a custom exhaust to rob a few more hp

Click to expand...

cutouts ?  put that back...
muffler? switch to one with more back pressure

/thread.

I would leave the exhaust as is.  Going with a bigger pipe diameter is not going to gain you any torque (probably lose a little).  Always go with the best flowing muffler you can.  Torque is not about backpressure, more about exhaust velocity.  A poor flowing muffler affects scavenging even at low rpms, and will more likely just hurt power everywhere.  Here's an explanation. https://www.carthrottle.com/post/wg3b6r9/  or see the sticky on in this section for even more info.

Best bet, is to get a very mild cam.  You want one with higher lift (.520-.550), a touch more duration than stock (200-206 intake/208-214 exhaust), more advanced ground in, and tighter lobe separation (112 to 114).  Something along the lines like this:  http://www.briantooleyracing.com/truck-stage-i-cam.html  This will be expensive as you'll need to delete the AFM, plus change valve springs, and get it tuned by someone knowledgeable in VVT. But you should feel a power increase across the board.  And definitely keep the VVT, as that will help the torque side of things.

Other than that, it's increase displacement, Supercharger, higher stall converter (but not too high), and/or higher ratio rear gear.

Shorty headers (I run JBA) and performance muffler (I run flowmaster 70).

If you are looking for more off-the-line performance, my suggestion is to go with a higher stall converter. I had a Yank TT2600 in my truck but it was behind a Magnacharger; it's my understanding that it was closer to 3000 in my case. enoniaM has a 3000 stall behind his truck.