which is exactly why the trd header will fit just fine. thorley probably got the rights to produce the trd header, which aligned with toyotas specifications (duh) and the actual thorley header is probably a take off of that. ie. thorley saw trd's and attempted to improve upon it, or make it cheaper.cartman said:ok thats good that i dont need to relocate anything, cuz i really wouldnt want to do that. And why would thorley make a header for trd if the header had to be fabricated to fit the car still? that dosnt make sense.