Is your carburetor still using 1950's technology? Upgrade it for serious performance using these billet aluminum metering blocks.
586-67166 is a standard replacement block for 2300-, 4150- and 4160- series carbs and offers improved throttle response.
586-67150 is calibrated for race applications and features changeable idle feed restriction and four emulsions for aggressive tuning.
586-67165 is a race-ready double pumper conversion that includes a primary block with original vacuum provisions and a secondary block with no power valve provision. The double pumper blocks have provisions for four-corner idle systems.