Advanced Engine Design 7960 Bronze Throttle Shaft Bushings for Holley Carburetors

The Advanced Engine Design 7960 Bronze Throttle Shaft Bushings provide a durable solution for repairing worn throttle bores in Holley 4150, 4160, and 4500 style carburetors. These precision-machined bronze bushings restore proper throttle shaft clearance and eliminate air leaks that can cause poor idle quality and inconsistent performance.

Key Features:

• High-quality bronze construction for superior wear resistance compared to cast aluminum
• Compatible with Holley 4150, 4160, and 4500 carburetors
• Package includes 8 bushings for complete carburetor rebuild
• Requires AED reverse cut machining and reaming tool for proper installation (sold separately)
• Eliminates air leaks caused by worn throttle bores
• Restores factory-spec throttle shaft clearances

Throttle bores commonly wear in Holley carburetors due to operation in dirty environments or improper throttle stop usage. These bronze bushings offer a permanent repair solution that outperforms riding directly on worn aluminum bores, ensuring consistent carburetor performance and improved engine drivability.