Holley 4150 & 4160

Holley street carbs and OEM replacement units use piston- type or diaphragm- type accelerator pumps. Piston pumps don’t offer quite...

There is always confusion surrounding the needle & seat on a Holley 2300, or one of the 4 barrels. Here...

Fuel Bowl Pump Diaphragm (proper installation) Before replacing the pump diaphragm cover, check for warpage by laying the cover on...

Power Valve Restrictions Holley carburetors for the street -especially those manufactured for 1973 and later engines with EGR systems -use...