Had my BBK LT headers installed last Wednesday, and everything was fine. Ran great but Saturday night leaving my friends house the "Check Engine Soon" light came on. Someone on another message board said I need MIL Eliminators... What does everyone here think? I did need to use the O2 extentions on the front O2's but the rear ones reached fine. Any idea's? Thanks in advance... Forgot to mention that I installed the BBK Catted X-Pipe at the same time as the headers.