Standard ca turbo injectors are a transparent yellow. Gtr is flat yellow from what i remember. Got a set kicking around somewhere

CAs generally make most of their power up higher in the rev range. Or atleast mine have
136kw is pretty good if that was with a 2.25inch exhaust. As ive found that mine abd a mates cas seemed dead after 4-5grand with small exhausts

CAs usually run rich

going a 3 inch exhaust over a 2.5 made mine alot better at higher revs. Going from 6 to 10 psi will also make a world of difference