For a program I went with DiabloSport it really helped my performance
For C.A.I. I just installed a K&N drop in filter I dont see any real difference
between C.A.I. and the stock C.A.I. The one your truck came with hooks up
to the same hole as a aftermarker part sucks in the same cold air shoots it
through a tube into the intake. I cant see 400 bucks to change!!