Headers and h or x pipe. Throttle body. None of them will give real hp gains. That's about it until you go for power adders. We've got tons of threads on chargers, turbos, and n2o. Check through some old threads or we can just fill up this one with the same stuff.
If you had the stockers maxed out they would. But if putting bigger injectors and maf on a stock motor won't do anything.the ecu is still running the same program. For more power you need more air and fuel at a 14.7 to 1 ratio so you need to be tuned for those mods as well. I am installing 24 pound injectors tomorrow but when I am spraying I go lean after 5000 rpm which would end in a catastrophe.
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