F2 headers long out if business that's why I know focussport headers will fit. The original I tried was Obx and needed mods. I measured my friends fswerks/ focussport header and it will fit with no issues.
2012 Audi Q7 TDI S Line ABTuning 391whp588wtq
01 Turbo Focus 300+ whp
2012 Focus 19" Niches, AEM CAI, F2 Race Header, 3" Borla Dual Exit, H&Rs, Eibach Sways 183whp157wtq