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  1. #1

    Default 8.1 Liter improvement in power--torque

    I have a 2003 GMC 3/4 ton w/8.1 and Allison and want to know if anyone has tried these kits
    by Banks or others for power and torque increase. I'm getting a larger 5th wheel and would like
    a little more power. Any info would be greatly appreciated. thanks

  2. #2


    I hadn't seen those before but those gains look pretty impressive!!

    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

  3. #3


    Can't go wrong with Banks. They didn't have them back in '05 when I moded my truck otherwise I would have used the kit. I do have there intake which you can see on my photo album. I have a Banks CAI, JBA shortie headers (look like Banks headers) Magnaflow cat-back and a Diablo tuner. I'm sure the power gains are very close to a Banks kit and you can feel the differance in power and torque.

    2005 Chevy Silverado Z71 Crew Cab
    6" Skyjacker lift w/Edlebrock dual front remote resoviour shocks, single rear remote. Rancho skid-plate.
    17" x 9" M/T Classic Lock Wheels, 35" BFG A/T or M/T tires
    4.10 PercisionGears w/factory locker, T/A Performance rear-end cover
    Banks CAI intake, ported throttlebody, JBA coated headers, over-sized Magnaflow cats, Magnaflow cat back exhaust, Diablo tuned
    B&M aluminum deep transmission pan
    Warn brush guard w/Warn 9.5 XP winch, PIAA bulbs, Line-X bedliner, AWS Black tool chest, Extang tonneau cover
    Weather Tech floor mats
    Cover-Craft seat covers
    Dash mat cover
    Formula One window tint
    One black Lab in rear seat.

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