C&L makes a nice 76 mm mass air for around $180. Pro M also makes some good meters. 24 lb injectors are good for about 400 hp, 30's are good for 450 (I think). The injectors and fuel pump want necessarily add more power, but they will give you something to grow on and prevent you from leaning out. The mass air will add some power, how much I don't know. I've never seen dyno numbers on a stock meter vs aftermarket meter on a blown car. If I had to guess, I would say about 20 hp.
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91 single turbo vert
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