Gutted Cat
Other than annoying raspy exhaust sound, nasty smell and potential fines ... no not really. 
Oh, and the trail of hipping bitching about it.
But seriously, I suggest a high-flow cat (Magnaflow makes nice small ones), it'll flow just as well and you can eliminate the above-mentioned issues.
A lot of guys eliminate them alltogether as part of a LongTube install. That at least eliminates the rasp.

Oh, and the trail of hipping bitching about it.
But seriously, I suggest a high-flow cat (Magnaflow makes nice small ones), it'll flow just as well and you can eliminate the above-mentioned issues.
A lot of guys eliminate them alltogether as part of a LongTube install. That at least eliminates the rasp.
i had a hollowed out cat for years and never smelled anything funny. but then again i wasn't riding behind myself. and my car is a 94 so no emissions here in NC. now i have x pipe with no cats at all



