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500 cfm carb, will it harm my mileage?

6852 Views 2 Replies 2 Participants Last post by  70Mach03
I've been to the preformance sites and I noticed a intake that was single plane. It recommended using a larger 2 barrel holley carburator. Holley offers the 350 and 500 cfm carbs. Will the 500 harm my wanted revving capabilities and gas mileage? Will the 350 work fine for the single plane?
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