Hi mate how are you?No idea what the brand is,was half expecting it to fail on the dyno for the $400 odd I paid for it lol.It was purchased as a plug n play basically as I had no idea if it was all going to work!Anyway it did work and has done about 9 events now and still going!!Got a couple of mates that swear by them claiming to be almost as good as the genuine ones at a fraction of the cost.Re the manifolds...yes all fabricated in metal in the shed including the rail which is fitted with ca18det injectors although they are running at 85% duty cycle due to the E85,I have some 850cc ones to fit before we crank it up to 15psi sometime this year.Simon and others have assured me it will take that sort of boost on E85 without drama,worst case may have to give the head bolts a tickle more ha ha,and your toyota box on the back no stress and slicks on the 4 corners via a H165 locked...Cheers