New racers every day are finding E85 as a cheap alternative to race gas and now Holley has raised the bar on E85 race carburetors. Holley’s popular 4150 Ultra HPs are now available with components and calibrations making them ready for ethanol. They’re available in 600, 650, 750, 850 and 950 CFM and all come in the exclusive Hard Core Gray hard-anodized finish – the perfect barrier to the corrosive properties of ethanol fuels. They have E85 specific metering blocks, high flow power valve, .130” stainless needle & seats, 50cc secondary accelerator pumps and secondary jet extensions installed.
All previous Ultra HP features are also standard such as all aluminum construction for 38% weight savings; large capacity fuel bowls, adjustable billet metering blocks, billet base plates, integrated idle bypass valve, and more.
See all of the products and details on the Ultra HP Product Page look for products that read “FOR E85 FUEL ONLY”