Lisle 55310 1/4" Hex Carburetor Adjusting Bit for Pre-1978 GM

The Lisle 55310 is a 1/4" hex carburetor adjusting bit designed specifically for adjusting idle and mixture screws on pre-1978 GM carburetors. This replacement bit is part of the Lisle 55250 carburetor adjusting tool system and works with the heavy-duty flexible shaft tool for accessing hard-to-reach adjustment screws.

Key Features:

• 1/4" hex bit profile for precise fitment
• Designed for pre-1978 GM carburetor idle and mixture screw adjustment
• Compatible with Lisle 55250 carburetor adjusting tool flexible shaft
• Allows access to recessed adjustment screws in tight engine compartments
• Durable construction for professional use

This bit is an essential replacement component for technicians and DIY enthusiasts working on vintage GM carbureted engines. When combined with the flexible shaft tool, it provides the reach and precision needed to properly tune carburetor idle speed and fuel mixture on Rochester and other GM carburetors from the pre-emissions era.