8.1 Liter improvement in power--torque

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by Bluewater, Aug 10, 2011.

  1. Bluewater

    Bluewater Rockstar

    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. ntbush83

    ntbush83 Epic Member 5+ Years ROTM Winner 1000 Posts

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

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    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.

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