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upgrade rockers or keep stock rocker ?

This is a discussion on upgrade rockers or keep stock rocker ? within the GTO forums, part of the Vehicle Specific category; Hey, guys i need your opinion, I have 04 GTO just bought a used 03 zo6 heads. Should I replace ...

  1. #1
    o4goatman
    Join Date
    May 2007
    Location
    Illinois
    Posts
    87

    red
    04 gto A/T

    upgrade rockers or keep stock rocker ?

    Hey, guys i need your opinion, I have 04 GTO just bought a used 03 zo6 heads. Should I replace the rockers or keep the stock rockers? My mods are :comp cam xr275hr-12 Duration: @ .050lift intake 222 Exhaust 224
    112 degree lobe separation angle
    lift: intake .566 Exhaust .568
    comp cams 7.4" moly pushrods
    2800 stall torque converter
    drag bag
    rear stablizer bar by slp
    I am also considering port & polish the heads, anyone know a good shop ?
    My current rwhp is 362hp
    My goal is to push 400 RWHP
    Any imput will be greatly appreciated.

  2. #2
    Member
    Join Date
    Aug 2005
    Location
    Mississippi
    Posts
    222

    Impulse Blue
    2004 GTO

    You don't have to get new ones. But there are some that end up loosing their bearings. I went with the new Yella Terra's. They are a very nice rocker and actually seem to make a little HP. At least on mine, it was making a little more before I spun the clutch on the dyno.
    Rob
    04 GTO
    96 WS6

  3. #3
    o4goatman
    Join Date
    May 2007
    Location
    Illinois
    Posts
    87

    red
    04 gto A/T

    How much is the rockers & where did you get it ? How much more h/p did rockers give you?

  4. #4
    Member
    Join Date
    Aug 2005
    Location
    Mississippi
    Posts
    222

    Impulse Blue
    2004 GTO

    New Era Performance is where I got them. How much HP? Don't really know. I'd say 5-8rwhp or so.

  5. #5
    9 second club blewbyu2's Avatar
    Join Date
    Apr 2007
    Location
    New Jersey
    Posts
    11

    Black
    2004 PONTIAC GTO

    You don`t need aftermarket rockers . The stockers are fine .

  6. #6
    Junior Member speeddemon100's Avatar
    Join Date
    Aug 2006
    Location
    CT
    Posts
    79

    Yellowjacket
    05 GTO M6

    Quote Originally Posted by blewbyu2 View Post
    You don`t need aftermarket rockers . The stockers are fine .

    100% truth unless of course your using the L92 heads like me and need a bigger intake rocker,blahhh

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