Every Street Avenger carb comes factory set and flowed but, using the external float adjustment with sight plugs, you can easily alter the float level to regulate fuel delivery pressure without the risk of overcompensation. The quick-change vacuum secondary can provide a 60-second modification of either 6% more acceleration or 5% more fuel efficiency. While available with manual choke, Holley offers a simplified electric choke for yet another easy adjustment to your vehicle, preventing accidental over-adjustments and ensuring great cold starts and smooth idling.

Shared Specifications

Adjustable quick-change vacuum secondary

Built-in secondary fuel filters

4th generation power valve with million-mile blowout protection

Adjustable needle and seat

Four vacuum ports

Street Avenger fuel metering system

Compatible with any 9-5/16" center-to-center fuel line designed for 4150 Series carbs

100% wet-flow tested and calibrated

Spec Variations

Offered in 570, 670, 770, or 870 cfm

Horsepower ratings from 300 to 500+

Electric or manual choke

These kits, put together by JEGS Professionals, include Carb, JEGS Braided Fuel Line Kit - 555-100821, JEGS Fuel Pressure Gauge - 555-41010