2300/2305 2BL to 4150/4160 bolt pattern Adapter, Billet, 3/4, 1.5 dia. bores Adapts Holley® 2300/2305 2 bbl. carburetors to intake manifolds with Holley® 4150/4160 4 bbl. bolt patter, 2-hole plenum design with 1.50 diameter bores Aluminium Gaskets are not included *Not legal for sale or use on pollution-controlled vehicles

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