does anyone know how much intake port cc? or cfm? flows at its highist lift point on a 4.8 lr4 and ls1 stock heads. i have read that 4.8 stock head has an intake port 200cc and exhaust 70cc just not sure if they are talking about port size or cfm flow. and if that is port size what kinda cfm could that flow.



still new at the game thanks for any help