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  1. mustang1994bob

    Does any one have Thumper gt40p's?

    I looked pretty hard and couldn't find anything, I've got a engine im building and I have gt40p's and wanted opinions from people that had thumper port theirs. I know he knows his stuff and he does good work on E7's but this is a different head and the price is kinda high, does anyone have flow...
  2. mustang1994bob

    what valve springs are e-cammers running?

    Ive got gt40p heads cobra rockers and e-cam what valve springs should I use
  3. mustang1994bob

    noise after ajustable control arm install

    I just got my adjustable control arms installed and its great, but I’ve got some noise that I’m worried about, I know that bumps in the road are gonna be louder and all, but I can now hear and feel my gears at different speeds (its kinda like a vibration) and I’m wondering if that’s normal noise...
  4. mustang1994bob

    whats wrong with these dyno numbers???

    OK heres all the info, whats up? Gt-40 intake 65mm throttle body 1/2in Spacer JLT cold air intake Mac off road prochamber Mac catback stock 5.0 w/210,000 miles with all these ive noticed a huge difference in power, PI 4.6's arnt even close, my friends 350z cant keep with me either...
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