Carburetors - we pioneered them who better to clean them? The leader in automotive fueling 1903, Holley was founded on the desire to push the performance envelope of fuel system design. We quickly became a leader in aftermarket carburetors and have remained on the leading edge of fuel delivery from the classic muscle era to modern day performance machines. Over time, carburetor internals and choke valves can accumulate gum, varnish and dirt, reducing drivability and fuel efficiency. Holley Carburetor and Throttle Body Cleaner removes these deposits, restoring easy cold starts, smooth idle and improved throttle response. It also excels at cleaning throttle bodies and plates, carb linkages, PCV valves, heat risers and other small engine components. The powerful formula dissolves grease and grime, often with no tear-down required. The formula is 50-state compliant and low VOC so it's tough on deposits but easy on delicate components including sensors and electronic chokes.