670cfm 4 barrel Truck Avenger Series Introducing the greatest thing to happen to off-road vehicles since four-wheel drive: the Holley Truck Avenger carburetor! The award-winning Holley Truck Avenger carburetor is the first carburetor designed from the flange-up as an off-road carburetor. No other carburetor comes close to the Truck Avenger�s ability to offer peak performance at extreme vehicle attitudes over rough terrain, and lightning-quick stump-pulling low speed response for towing and mud-bogging. Flood-free operation up to 40 degrees while climbing and 30 degrees during side hill maneuvers and nose down descents. This allows you to off-road in confidence with out the annoying hesitations, stalling and flooding typically associated with carbs in an off road environment. Features include: New Annular boosters provide incredible low and mid range throttle response and torque, single fuel inlet banjo fitting for Bolt and Go simplicity, Exclusive new No Trouble one-piece vent tube eliminates fuel spillover during extreme maneuvers and clear sight plugs for easy float setting, quick-change vacuum secondary cap and electric choke for No Trouble operation. Note: 304 V8 engine will need bigger camshaft, headers and aftermarket intake manifold with Holley bolt pattern for carburetor to work properly.