well i dont know personally but i was going to get a turbo manifold from obx and a fpr from them and my friend told me they are, in his words 'the worst of the worst.' i dont really know what his support is, but i think he said their manifolds tend to crack very easily when they heat up/cool down. imo dc isnt worth it either, ive heard lots of ppl that say the gains arent worth the prices.... header wont do too much on 5th gen. if you wanna dish out the extra cash, look up the mugen header or smsp header.