I'm pretty sure that it's supposed to be a tell tale sign of a bad cat, i think. when it starts geeting clogged or whatnot it will give a rotten egg/sulfer like odor.

~Alex


~Alex Ex- SVT Driver627 MUST SELL!!!LOCAL: Pre-98 MOLDED trunk Polk db speakers Corolla parts LED Underbody Kit PM 2000 Green CSVT gone on 2/17/06 2001 Toyota Corolla (SHE RUNS!!!) 1989 Mustang LX 5.0