Used on Holley/Mustang 4180 4 barrel carbs where idle mixture screws are attached to the base plate. Holley Brass Idle Mixture Screws & O-Ring Gaskets. You will receive FOUR screws & FOUR O-Ring gaskets.
Holley Model 4180 Idle Mixture Screws With O-Ring Gaskets - Twin Pack.
Holley Model 4180 Blue Gasket Kit For Vacuum Secondary 600 CFM Carbs
Holley Model 4180 Series Vacuum Secondary Linkage Rod.
Holley Model 4180 Insulator Base Flange Gasket.
Holley Model 4180 EGR Insulator Base Flange Gasket.
Holley Model 4180 Carbs Brass Throttle Blade Screws.
