4500 1350CFM 3 CIR 2X4 -

4-barrel, 1050 CFM carburetor with 3 circuit metering for drag race, pro street, or high horsepower engines. All-aluminum construction, 3.8 lbs (28%) lighter than original models. Features a polished finish with red anodized billet aluminum metering blocks and booster inserts. The main body is 5/16 in. taller with larger radius air entries optimized using CFD software for smoother flow into fully machined, big bore venturi. Includes an integrated idle bypass valve, extended air cleaner flange, high capacity fuel bowls (20% more fuel capacity, integrated fuel shelf, internal baffling), 12-hole billet booster inserts for superior atomization, fully tunable billet metering blocks, adjustable external linkage, TPS mounting points, and knurled (hand adjustable) curb idle screws. Each calibration is dyno and track tested. Also features dual 50cc accelerator pumps, clear sight windows on fuel bowls, a built-in drain plug, -8 (o-ringed) inlet threads, and fully adjustable stainless steel external linkage. 100% wet-flow tested by Holley technicians.