The Holley 135-11 is a vacuum secondary diaphragm kit for Model 4160 vacuum-secondary carburetors, including many 390, 600, and 750 CFM applications. The diaphragm opens the secondary throttle plates in response to airflow, and replacing a torn or stiff original restores proper secondary operation. The kit includes the diaphragm with a 1.97 in. actuating rod and the mounting screws.

Holley 135-11 Compatibility Notes:

• Vacuum secondary diaphragm kit for Model 4160 carburetors
• Fits many 390, 600, and 750 CFM vacuum-secondary carburetors
• 1.97 in. rod length
• Includes diaphragm and mounting screws
• Sold as a kit