These Quick Fuel Black Diamond SS-Series carburetors are designed to offer the power of a race carburetor in a streetable package that weighs 5 lbs. less than other carburetors. They feature a unique PTFE Teflon® coating that provides a highly durable satin black finish, is impact and scratch-resistant, and impervious to underhood chemicals. The coating also offers a six percent reduction in fuel temperature, allowing for improved performance. Manufactured completely from aluminum, they allow you to change the idle feed and offer power valve channel restrictions and idle and high-speed air bleeds for the ultimate in tunability. The solid-state, electric-choke Quick Fuel SS-Series carburetors have billet throttle bodies, billet metering blocks, 4-corner idle systems, secondary jet extensions, and notched secondary floats. The vacuum secondary carburetors feature fuel bowls with a single-sight glass window, while the mechanical secondary carburetors have dual-inlet, dual-sight glass 4500-style fuel bowls and include additional links to tune the secondary opening rate. Quick Fuel has done it--they've created an all-aluminum Super Street carburetor that's perfect for your high performance street machine.