It ones come from overseas BUT TO TSP's SPECS! If you don't know exactly what's going on or FIRST HAND experience then PLEASE don't assume and think it might be a bad thing!
It's NOT I've installed a set and was a breeze like any other. I'm also waiting on a set to put in my cousins L99. Also if you keep on searching like bringing this old thread up YOU'D SEE there are no complaints on them. Thanks again for trolling Camaro5.com
2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.