These tools are designed to adjust settings on computer controlled Rochester, DualJet, QuadraJet, and VaraJet carburetors on carbureted GM engines.

Applications:

• 2 mm double-D - VaraJet lean authority screw and idle air bleed; and DualJet and QuadraJet mixture control adjusting screw
• 2.5 mm hex - DualJet and QuadraJet TPS adjusting screw
• 7 mm double-D - DualJet and QuadraJet main metering jets
• 10 mm double-D - DualJet and QuadraJet mixture control solenoid-rich screw