will the bbk 78mm throttle intake fit my 2003 grand marquis
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aftermarket throttle bodies
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It may, but I'd be researching throttle-bodies and MAF meters and INJECTOR SIZES before you go changing that sort of thing. I don't know what lb. injectors come in the '03+ but you may have to go 24-40+ depending on if you're turbo-or-supercharging it.
If nothing else, you'll need a CUSTOM TUNE flashed to your ECU, to make everything run properly, going that big.
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Okay, all I know is the older HO 5.0 motors are restricted to about a 70-72mm TB size with their 19lb orange top fuel injectors, try to go too big on MAF + TB and you'll run into fuel starvation issues with the stock injectors. I think I've seen 24lb injectors with gray tops, and I know 40lb injectors exist, but dunno if they're all aftermarket or who makes good ones.
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