Holley Carburetor Vacuum Secondary Diaphragm – 2.054 Rod Length, 135-4, WALKER Brand

If you’re rebuilding a Holley carb or just need to replace a worn-out diaphragm, this is the part.

It’s a vacuum secondary diaphragm with a rod length of 2.054 inches, part number 135-4.

It’s made by WALKER here in the United States, and it’s brand new, ready to install.

Also cross-references as H14B.

This little piece is crucial for proper secondary operation—if it’s torn or old, your carb won’t open up right.

Get your Holley breathing again with this direct replacement.