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    1. #24
      Join Date
      Nov 2006
      Location
      Hildebran, NC
      Posts
      998
      Country Flag: United States
      Quote Originally Posted by tommycomfort View Post
      Just picked up a set of GM Performance Parts Fast Burn heads for the wagon. I think this normally takes the ZZ4 from 355 HP to 385 HP but the new ZZ5 uses a ZZ4 short block with the new Fast Burn heads with beehive springs to make right at 400HP and pretty fair torque. So, obviously we're ordering the parts to convert them...
      Those heads are awesome. You wont think it is the same motor once you bolt them on!!!!!!






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