Look up your emissions regulations, I think you might at least need a pipe so they can insert the sniffer tool.
In south Canada, they just check whats coming out the pipe. They don't check gas cap pressure and they don't care whether your CEL is on or not.
96 300ci M5OD 2wd Reg Cab Long Bed 3.31 LS Gears and 8-Track player
A question that sometimes drives me hazy: am I or are the others crazy?