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FED 387 · 07-06-2007, 05:05 PM

A 3310-2 is a Model 4160 holley whereas a 3310 is a 4150 model carb--- suttle differences in power valves, secondary activation( vacuum vs. mechanical) and jetting with a removable jet block in the secondary vs. a fixed plate, double pump vs. single pump etc.... cfm ratings are the same for both carbs hope this hellps you out--- Comp 387

07-06-2007, 05:05 PM	#6
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,349 Likes: 324 Liked 280 Times in 150 Posts	Re: Holley Carbs A 3310-2 is a Model 4160 holley whereas a 3310 is a 4150 model carb--- suttle differences in power valves, secondary activation( vacuum vs. mechanical) and jetting with a removable jet block in the secondary vs. a fixed plate, double pump vs. single pump etc.... cfm ratings are the same for both carbs hope this hellps you out--- Comp 387