Holley 570 cfm Street Avenger carburetor is designed to be street ready, right out of the box for stock or mildly modified engines. The Holley 570 cfm Street Avenger carburetor is specifically calibrated for the street. Some modified engines may require tuning by jet changes or power valve changes. The Holley 570 cfm Street Avenger Carburetor provides precise fuel metering for low end torque, awesome acceleration. Close limit jetting is used for precise performance and the air-fuel idle is tuneable to provide the ultimate in performance with crisper acceleration. The Holley 570 cfm Street Avenger carburetor features four vacuum ports, easy to use electric choke and clear sight plugs for easy float adjustments. The Holley 570cfm Street Avenger carburetor features built in secondary fuel filters and "no touble" power valves. The Holley 570 cfm Street Avenger carburetor has a "quick change" vacuum secondary housing for easy spring changes. The Holley 570 cfm Street Avenger carburetor fits any "square bore" intake such as Edelbrock, Weiand, Holley, Offenhauser, or intakes with dual bolt paterns such as Edelbrock's 2101 Performer intake for the small block Chevy. When using the stock GM Quadrajet intake, a carburetor adapter must be used. Installation instructions and hardware included. Brand new, no rebuilts! HOLLEY 0-80570 570 CFM Street Avenger carburetor Holley 0-80570 Order quickly and easily over the internet on our secure YAHOO! system 24 hours per day or talk to a real, live sales person at 419-331-2470 during our business hours. WE TAKE ORDERS to CANADA. For ordering information, click on "Orders to Canada" at the top left side of this page. LOW COST SHIPPING! Just $12.95 to ship your entire order by U.P.S. ground within the continental United States. Purchase any quantity of items and you pay just $12.95 to have it shipped! The more you order, the more you save! Orders to Hawaii, Puerto Rico, Virgin Islands, and some parts of Alaska will have shipping added due to having to be shipped by air freight. Customers from these states will be emailed the shipping costs for approval before we ship the order. We use Postal Priority for APO and FPO addresses only. Additional shipping charges may apply to APO or FPO addresses. Payment Methods: CREDIT cards or DEBIT cards VISA, MASTERCARD, DISCOVER, AMERICAN EXPRESS, MONEY ORDERS.