i have BBK unequal shorties, BBK x-pipe w/ cats, and flowmaster 40 series, 2 chambers. All produsts have lasted so far and i believe i got them back around Jan/Feb. The only thing is my headers are sorda blueish/purple and the welds in the exhaust are surface rusted - no big deal. I have a sound clip for anyone that wants to hear it. Just email me at pi2005@sbcglobal.com or on AIM at scorcher2005. When i got the new exhaust on there was a small, noticable difference in power.