Originally Posted by Zebra99
No has mentioned Stett CAI....it's a true CAI - very nice product and will likely see the same gains as the AFE Stage II SI.
And for $400 less - grab a JB4
You cannot use the STETT CAI on the 335iS. The IS has a secondary radiator in the air duct where the STETT filter would go, there just isnt any room