I was gonna order mishimoto intercooler pipes for my 2001 lb7 .part number mmicp-dmax-02 . They say they fit 2002 to 2004.5 lb7? I called them to ask if they fit a 01 to be safe.they had no idea all they said was its tested for a 02 to 04.5. Was just wondering if any of you guys know if there is any difference between 01 and 02 lb7? Or is it just a typo on there part? Im new to the duramax scene so apologies if this is a dumb question.