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it's not clear - are you saying with tuning and/or a new chip alone they're getting 635 HP? or with also changing the pulley? Most guys are getting that by doing all of the above

hey there Neil! Nice pics - your car has same paint scheme as mine. Of course you know the red ones are the fastest, something to do with the engine assembly guys giving extra power to the lumps slated to go in red cars. Some guys are dyno-ing them at 598 HP at the rear wheels. :pepper: