Lingenfelter CAI, nuff said.

 

A few years ago one of the car magazines ran dyno tests on the top name brand CAI. Most of them showed a 15 HP gain on an otherwise stock LT1 engined Camaro. Moroso came out on top showing an 18 HP gain. I suspect that conditions may have changed by the time they got around to Moroso. The stock intake plumbing on Lt1 Camaros is pretty restrictive, and I suspect a lot of the power gain is due to better plumbing, because the stock air box actually takes in air outside of the hot engine compartment