Injen Evolution Cold Air Intake System (Dry Filter)

A cold air intake replaces the factory airbox, tubing and filter so the engine draws air in more freely. Injen's Evolution kit uses a dry filter, which means it gets cleaned and reinstalled with no oil involved.

why this one — The dry filter is the reason to pick this one: no re-oiling step at service time, which is the usual chore with the oiled filters most competitors ship. Injen claims up to 13 hp and 14 lb-ft from its own in-house dyno, not an independent one. At $375 it is among the cheaper full intakes here and Injen confirms Sierra 1500 fitment on its own site.