I have a couple of bullet cats still welded into the exhaust from my streetcar days and I don't particularly want to deal with the logistics of removing them. If I switch from the VR1 stuff I've been running to something like Redline's race oil (the red bottle, not the blue) would it kill the cats in short order?

Mitch - I'm gonna go out on a limb here and guess that you have a cat....hehe....just thought I'd save you the trouble