The Holley 135-3 is a vacuum secondary diaphragm that opens the secondary throttle plates on many vacuum-secondary Holley carburetors, including list numbers in the R2929, R3116, R3259-1, R3300, R3410, R3977, R4118, R4201, R6127, and R80512 families. With a 1.97 in. actuating rod, it directly replaces a torn or hardened original that is causing erratic or no secondary opening. It is molded from high-performance rubber.

Holley 135-3 Compatibility Notes:

• Vacuum secondary diaphragm for Holley vacuum-secondary carburetors
• Fits a wide range of R-series list numbers
• 1.97 in. actuating rod length
• High-performance rubber construction
• Sold individually