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  1. Dad's '87 Grand Marquis 5.0 and high flow?

    Off-Topic
    What gains may I be looking if I get my dad a Spectre High Flow filter? I checked his engine bay and it has this cold air type tube from the engine to the filter, to the front of the radiator. I bought him a Spectre drop in filter and hope these older cars get better increases from things like...
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