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sparkplug questions

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Old 01-21-2007, 11:50 PM
mike6.0 mike6.0 is offline
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sparkplug questions

i have a superchips programmer on my 03 5.4 i have been told that using plugs other than the autolite or motorcraft plugs will cause problems. my question is do i need to use the ford plugs or can i use a better aftermarket plug since i have a programmer. also, are cold air intakes worth the money?
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Old 01-22-2007, 01:18 AM
galaxie641 galaxie641 is offline
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You will not gain anything with aftermarket plugs unless you have a supercharger or are pushing 350hp with a N/A engine.

On FIPK's It depends on what you mean by worth the money, I like them because you no longer have to buy a $10-$20 air filter every 15K miles. I never noticed any performance gains with mine although it did seem that throttle response was a hair better. I would guess with headers, bigger exhaust and a tuner a FIPK might net you some performance but I don't see it happening by itself.
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Old 01-24-2007, 04:13 PM
rsylvstr rsylvstr is offline
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stick with MC plugs!!!

my mods have netted me about 1-3 MPG and a smoother idling/running motor.
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