5110 AED/Advanced Engine Design Carburetor Needle and SeatWe cover the complete spectrum of needle and seats for gasoline and alcohol carburetors. First we have the traditional 0.110 Inch Viton high flow units designed for up to 650 Horsepower on gas. For power levels over 650 Horsepower with single carburetors or with marginal fuel systems we recommend our special 0.125 Inch Viton tipped assemblies which flow approximately 25 Percent more fuel than the 0.110 Inch and will accept up to 7 to 8 Pounds of fuel pressure. For alcohol applications our special 0.150 Inch stainless steel needle and seats are the ultimate in fuel capacity and seating ability where optimum fuel flow is required