Just throwing this out there......I have an 07 auto with 68k. I replaced the driver side manifold and put on an MBRP exhaust with about 40k. I started smelling an exhaust smell in cab about a month ago and while changing fluids, I decided to check exhaust for possible leaks or loose clamps. Well it's the damn driver side manifold cracked again. I am wondering if the Rusty's CAI has anything to do with it. I'm not a mechanic so what do you guys think? Anyone else having repeated manifold issues using a CAI?