GMC Truck Forum banner

smog

  1. Engine & Performance
    Any cam gurus out there know what i can do cam wise here in great californa ..I would like something that chops and is better performence wise.I heard you can get away with like a tsp 226/228 with a great tuner .. or is it false ?Its a 2006 Silverado extend cab for anyone wondering with the 4.8L
Top