flareside_thunder

Actaully as restrictive as you think your intake (plenums) may be they really are not........they do exactly what they were designed to do.......deliver torque to these heavy trucks. Drop in K&N filter is about all you can do......however, for that extra peace of mind.....find the tube that goes from the airbox to the core support from either a 300-6 or a 460.......the airflow is more direct than what these 302's and 351w's come with.