i noticed my car would smoke some during warm up once i put the MR test pipes and ypipe on. now that i added the single apexi exhaust, it smokes more, but only during warm-up for the first few minutes. its prolly just the extra fuel used during cold starts......but anyone else having this happen? i thought id ask before i start thinking its motor time, but my guess is cuz of the lack of cats and less backpressure. chime in if you will gents!