The B-7520 2 bbl has become the standard for multiple carburetion in high horsepower racing engines. It was the first in our 7000 series of carburetors. Designed from start to finish as a racing carburetor, drawing on our over 4 decades of experience in the manufacturing of carburetors for motorsports. It was introduced to the market in 2007 to fill the demand for multiple carburetor applications using the 2 bbl format. This new carburetor eliminated the former requirement of having to take a 4 bbl carburetor and cut it in half to make a "split". Even when split, the available carburetors which were based on a 40+ year old design have been proven inadequate for today's modern racing engines. The performance of the B-7520 speaks for itself, holding current naturally aspirated and N2O records for the quickest and fastest carbureted runs around the world. Popular with Mountain Motor Pro Stock, Pro-Mod, Competition Eliminator, Top Sportsman, 10.5 Outlaw and Quick-8 classes.

     CNC machined from aircraft quality aluminum permanent mold castings, the B-7520 is offered in a wide range of sizes to accommodate race engines from 800-2200 plus horse- power. It features spread throttle bores for better fuel distribution, longer venturis for smoother fuel metering and a totally innovative metering system. The fuel jets and their pickups are located so they remain in liquid fuel even when acceleration rates exceed 3.5 Gs. The light weight billet metering blocks feature a lengthened main metering well and multiple bleed systems provide improved metering and tuning flexibility unavailable in the past. The manifold mounting flange uses the industry standard 2.75" X 5.38" hole pattern, while the scoop tray uses a 3.75" X 6.71" oval opening. Both of these hole patterns are symmetrical to the C/L of the carburetor. The sizes offered range from 1.90"-2.22" venturis and 2.20"-2.60" throttle bores. Two different size booster venturi castings provide even greater flexibility. Available with either 4 or 5 circuit metering.