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Ultra Xp
    carburetor tuning and adjustmentsCarburetor Installation & Tuning SegmentsCarburetor
    Understanding Holley Vacuum Secondary Carburetors
    Mike Magda
    05/17/2021
    10 min read
    tech
    Holley CarburetorsHolley 4150Ultra XP
    Holley's Ultra XP 4150 Is One Trick Small-Bore Race Carburetor
    Wayne Scraba
    04/14/2021
    10 min read
    tech
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