Holley Redesigned its Legendary 4150 Carburetor for Racers, New Ultra XP Carb is PERFECT for Tunnel Ram Setup
Spin back the clock about 45 years or so. If you had an engine combination that could handle it, what you really needed was a tunnel ram with a couple of Holley 660 center squirters perched on top. If you burned corners, a cross ram with a couple of 650’s was the ticket. Over time,




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