The Tillotson OE Diaphragm gasket kits use high-quality OEM components. 

They prove to be far superior to almost all aftermarket kits and individual pieces. To ensure the performance and longevity of your carburetor use Tillotson OE Diaphragms Kits or our EC Pro Kits that use many Tillotson OE parts and components suitable for racing conditions and performance. 

This is a standard gasket and diaphragm kits designed for standard volume(single stack, gas) pump plate on Tillotson carburetors. We recommend replacing the gaskets and diaphragms every 3 races or if you see a drop in performance sooner. For OE applications change the gaskets and diaphragms every 4-6 weeks or as soon as you have trouble starting and tuning the carburetor. We recommend using ethanol-free gasoline especially in 4-cycle applications or the gasket and diaphragms will require more frequent replacement. 

This kit includes

• .006” Pump Diaphragm

• .020” Pump Diaphragm Gasket

• Main Metering Diaphragm

• Main Metering Diaphragm Gasket

DG1-HL Tillotson OEM Diaphragm Gasket Kit fits all standard volume(single stack, gas) fuel pump carburetors including these racing carburetors: HL-304F,HL-334A,HL-334AA,HL334AB,HL-360A,HL-375A,HL-385A, HL384A&B