This Viton vacuum secondary diaphragm is built for outboard 6-pack carburetor applications, replacing the OEM diaphragm on multiple Holley carburetor numbers.
Specifications:
- Brand: Holley
- Category: Air and Fuel Delivery
- Material: Viton
- Part Type: Carburetor Accelerator Pump Diaphragm
- Product Type: Vacuum Secondary Diaphragm
- Sub Category: Carburetion
- Part Number: 135-6
Fits carburetor numbers R3659, R4365-1, R4382-1, R4383-1, R4393-2, R4394-2, R4671, R4672, R4789, and R4790.
FAQ
What carburetors is this diaphragm designed for?
It's primarily used on outboard 6-pack carburetors, covering Holley carburetor numbers R3659, R4365-1, R4382-1, R4383-1, R4393-2, R4394-2, R4671, R4672, R4789, and R4790.
What is the diaphragm made from?
Viton, an OEM-grade material.
What does this part do?
It's the vacuum secondary diaphragm that actuates the secondary throttle opening based on engine vacuum signal.
What is the part number?
Holley part number 135-6.

