E-85 Conversion Kit For 4500 HP® style carburetors. Comes with all the parts to rebuild and recalibrate your carburetor for E85 along with detailed instructions. Includes: ~ (2) Billet 3-circuit metering blocks w/4 stage emulsion and adjustable restrictions ~ (4) HP® style boosters with CNC aluminum annular inserts that are modified for E85 and anodized ~ (2) replacement Nitrophyl® floats - standard primary and notched secondary - sealed and molded for corrosive fuel ~ Stainless steel squirter screws, accelerator pump diaphragm springs, .130" stainless steel needles & seats, and GFLT 50cc diaphragms ~ An initial calibration of air bleeds and jets ~ Various gaskets, seals, and pins required to complete the conversion.