The Holley 37-1539 is a Renew Kit for rebuilding Model 4150 and 4500 carburetors with genuine Holley service parts. It includes the gaskets, O-rings, accelerator pump diaphragm, needle and seat, and power valve needed to restore a carburetor to original specifications, along with a detailed instruction sheet.

Holley 37-1539 Kit Contents:

• Renew Kit rebuild kit for Model 4150 and 4500 carburetors
• Includes gaskets, O-rings, and accelerator pump diaphragm
• Includes needle and seat and power valve
• Detailed instruction sheet included
• Sold as a kit