I had OBX and now have TSP Headers and I can say for sure that the OBX fit better. My TSP Headers were hitting my steering shaft just a bit when I turned left. I never had that problem with my OBX Headers.
I only changed because I got a deal on a complete exhaust and it came with the Headers. I can say for sure either one is great.
Customer service on the OBX if there is a problem with them is a little hard to get but with the TSP (yes they are made in China) they are located in Texas and they personally inspect every Header when it arrives in their shop for flaws and their customer service is top notch.
Texas speed LT Headers and High Flow Cats, Magnaflow 3 inch cat-back Exhaust, SNL V2 Comp CAM, Texas Speed Underdrive Pully, G5CR CAI, Hurst Short Throw Shifter, JetFlo Mass Air Sensor, Custom Grill, Amber AAC Headlight and Fog Light Halo, Amber footwell Lighting, Amber under hood lighting, RK Sport Ram Air /Heat Extractor Hood and ADM Racing Scoop. 447.9 RWHP 428 TQ
My car is exactly that, No one has to like it but me!