Holley Adjustable Needle and Seat - 0.097 Orifice - Viton - Holley Carburetors HS-EXT-ANT-5R Dart Small Block Chevy

Dart Small Block Chevy

63401 fits all 3" to 3

Performer 90 Degree V6

Seal and Lock

Holley Adjustable Needle and Seat - 0.097 Orifice - Viton - Holley Carburetors HS-EXT-ANT-5R Dart Small Block ChevyHolley offers a number of needle and seat assemblies for its carburetors. The configuration of the needle and seat assembly and its seat size depend on carburetor application, CFM size and type of fuel bowl used. Operation is simple. Needle movement is controlled by a metal tang on the float arm. Upward movement of the float causes the needle to close the seat; downward float movement causes the needle to open the seat. Seat size determines how much