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Performance Upgrade Input

Discussion in 'Performance & Fuel' started by redNecKansas, Sep 26, 2012.

  1. redNecKansas

    redNecKansas New Member

    OK guys I have an 03 GMC Sierra 5.3 V8 Z71 and I have been looking at doing some Performance upgrades within the next year and would like some input on what you guys think would be good.

    I already have mind set on heads, cam, valve springs(rockers, rollers, lifters), long pipe headers, and a DiabLew tune package. What else would be good without doing a 6.0L swap?
  2. dobey

    dobey Member

    Cat-back exhaust and CAi if you haven't already done them.
  3. ahmitchell1

    ahmitchell1 New Member ROTM Winner 1000 Posts

    Injectors, stall converter, coil packs and coil wires, and I also throw in some tranny work cuz the 4l60e isn't made to be hammered on
  4. ChevyHD

    ChevyHD New Member

    Does Lew tune your TCM as well?
  5. ahmitchell1

    ahmitchell1 New Member ROTM Winner 1000 Posts

    Yea he can, maybe he'll jump in and give his insight
  6. ChevyHD

    ChevyHD New Member

    Alright, because with the mods he listed, and some tranny work, a good tranny tune would be very beneficial IMHO
  7. ntbush83

    ntbush83 New Member ROTM Winner 1000 Posts

    Just do a turbo kit on low boost. Best bang for the buck imo
  8. ChevyHD

    ChevyHD New Member

    Hell with it. Put a damn crate LML in it.
  9. PantheraUncia

    PantheraUncia Active Member 1000 Posts

    Yep I hate my 4L60e they need to put it in a go cart.......:rofl:
  10. ahmitchell1

    ahmitchell1 New Member ROTM Winner 1000 Posts


    If I keep my truck I know I will be doing a stage 3 or 4 kit on the tranny that way I know it can handle whatever I throw at it

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