Just like the wildly successful Billet Aluminum Street Series carburetors, the new Proform street carburetors are constructed of lightweight aluminum. They include changeable idle air bleeds for easy non-permanent calibration changes if needed. You can keep your drills in your tool box because fine tuning is accomplished by simply changing air bleeds not opening calibration restrictions with a drill bit.

Each street carburetor has metering blocks with a street performance calibration that's ready to roll right out of the box, and developed for today's high performance engines. Four corner idle on mechanical secondary carburetor is also featured to help fine tune the idle with aggressive camshaft profile. Changeable idle feed restrictions further expand the idle adjustment capabilities.

The package is completed with high quality, light weight die-cast aluminum fuel bowls with fuel level windows for quick visual reference. Float level changes do not require removal of a sight plug with the risk of fuel spilling all over the top of your engine. Bowls come equipped with 3/8" inverted flare fuel inlet fittings and will accept all conventional dual feed fuel lines compatible with Holley® four barrel carburetors.