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More power
I have a 91 k1500 with a 5.7 350 crate motor and I'm looking for more power I seen other places that people say throttle body spacers and air intakes are useless wondering if anyone else had better lucky with them and also jet preformance chips. Also I was looking at a edelbrock preformance plus cam and lifter kit wondering if anyone else has it or something and about how much more power I'd get from it
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so what I'm saying is that if you want an engine with considerably more horsepower, as opposed to the measly gains you get with cold air intake or custom exhaust system, then you have to BUILD that engine, with a plan in mind.
If I were you I'd consult with a speed shop and come up with a total game plan and a budget. Short answer---if you don't dig into that engine's internals, or you don't go to a supercharger, the best you're going to scrape up with intake and exhaust mods is maybe 15-20 HP.