Originally Posted by kevin8086

i have an extra pair of cats. there are 4 total. 2 per pipe. there is a cat then the rear O2 sensor then another cat after that. i just gutted the one behind the O2 sensor in both pipes so i dont get a cell. i will let you know about sound level and smell when i install them this week(end). BTW it is kind of a pain in the A$$ to gut them so i hope it's worth it.