30cc accelerator pump diaphragm for Holley, QFT, Demon. This is high quality Buna material. All Holley 2300, Holley 4160, and Holley 4150 carburetors accept this diaphragm. This replaces the HOLLEY 135-5. We also offer an alcohol diaphragm. Bulk Pricing available. 1-24, 25-99, 100+ Discounts are shown in the shopping cart.