I just bought a set of the up and forward OBX headers, two words... SUPER NICE! 1/2" thick flanges, primary tubes tig welded inside and out at the flanges, very heavy gauge, they weigh as much as my full length Schoenfeld headers, V-bands are top quality with reciever groove, they clear the stock steering shaft. The only down fall with them is they will not work with the sheetmetal valvecovers that have the bolts through the top. I can't tell you anything about the $179 dollar T3 flange style Ebay headers but what I can tell you is someone spends $179 bucks for Ebay stuff and it cracks and it instantly get black listed as "Erape" Crap, everyone stay away but someone else spends $1500 for a custom built set and it cracks then it's like "ahhh well I'll just send it back to the guy who built them to have it fixed, must be a flaw"... Bottom line is turbo exhaust see more heat than a N/A exhaust ever should and then you see guys hanging 30 lb. each twins let alone 20 lbs. of crossover piping and a 40-50 lb. single turbo off a header with inadequate or no support one should expect cracks. I've seen homemade headers built from 16 gauge mild steel as well as many sets of the Ebay deals last years with no problems and I've seen $1000+ professionally built stainless deals crack almost immediatley with no ryme or reason, could be a lot to do with tuning?