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Holley's Street Avenger vacuum secondary series of carburetors are available with manual or electric choke, and in 570, 670, 770 and 870cfm applications. However, the aluminum versions, which weigh less than 8 pounds, are only available in 670 and 770cfm. All feature quick change adjustable vacuum secondaries and the Street Avenger fuel metering system, which is calibrated for "monster low-end torque, awesome acceleration, and unmatched top-end horsepower" according to Holley. Included with the carburetor are an installation and tuning DVD as well as a printed manual, gaskets, fuel line kit and two vacuum secondary springs, giving three different rates when you include the spring that comes in the carburetor. View Related Article
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