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BRAND NEW HOLLEY 4150 ALUM ULTRA XP, 750 CFM, HARD CORE GRAY, MECHANICAL SECONDARIES, COMPATIBLE WITH МETHANOL

XTREME PERFORMANCE HOLLEY ULTRA XP CARBURETORS FEATURES AN INTEGRATED IDLE BYPASS VALVE THAT ALLOWS FOR IDLE ADJUSTMENTS WHILE MAINTAINING THE CORRECT THROTTLE PLATE TO TRANSFER SLOT RELATIONSHIP, HIGH CAPACITY FUEL BOWLS WHICH FEATURE 20% MORE FUEL CAPACITY TO ELIMINATE STARVATION, INTEGRATED FUEL SHELF TO MINIMIZE FUEL AERATION & INTERNAL BAFFLING TO CONTROL FUEL SLOSH.

OTHER FEATURES INCLUDE ALL ALUMINUM CONSTRUCTION, FULLY TUNABLE BILLET METERING BLOCKS, BILLET BASE PLATE, ADJUSTABLE SECONDARY LINKAGE & KNURLED (HAND ADJUSTABLE) CURB IDLE SCREWS. HOLLEY ULTRA XP CARBURETORS ARE THE ULTIMATE IN SQUARE BORE RACE CARBURETORS!

NOTE: THIS MODEL OF CARBURETOR HAS THE SQUARE BORE FLANGE BOLT PATTERN. IT CAN REPLACE HOLLEY, EDELBROCK, CARTER AFB & AUTOLITE STYLE CARBURETORS WITH 5 3/16" X 5 5/8" BOLT PATTERN. IF YOU HAVE A SPREADBORE STYLE INTAKE MANIFOLD, YOU WILL NEED AN ADAPTER TO INSTALL THIS CARBURETOR. SIMILAR TO THE MR. GASKET #1932.

FEATURES:

• ALUMINUM CONSTRUCTION
• HARD CORE GRAY WITH BLACK ANODIZED BILLET ALUMINUM METERING BLOCK & BOOSTER INSERTS
• DESIGNED FOR USE ON DRAG RACE, CIRCLE TRACK, ETC.
• METHANOL SPECIFIC CALIBRATION
• CONTOURED VENTURII INLET OFFERS BALANCED AIRFLOW FOR INCREASED HP
• AIR BLEEDS MOVED OUTWARD ALLOWING SMOOTHER TRANSITION OF AIRFLOW FROM TOP OF CARBURETOR INTO VENTURII
• METERING BLOCKS FEATURE IMPROVED DURABILITY, TRUE GASKET SEALING & FULLY ADJUSTABLE (EMULSION BLEEDS, POWER VALVE CHANNEL RESTRICTORS & IDLE FEED RESTRICTORS)
• INTEGRATED IDLE BYPASS VALVE
• DUAL 50CC ACCELERATOR PUMPS
• FUEL BOWLS PROVIDE 20% MORE FUEL CAPACITY WHILE CONTROLLING SLOSH WITH INTERNAL BAFFLING
• CLEAR SIGHT WINDOWS ON BOTH SIDES OF BOWLS
• BUILT IN DRAIN PLUG IN FRONT CENTER OF BOWL PROVIDES EASY ACCESS TO EMPTY CONTENTS OF BOWL
• 8AN (O-RINGED) INLET THREADS
• .150" STAINLESS NEEDLE & SEATS TO CONTROL E-85 DEMAND
• 4 CORNER IDLE
• ELONGATED (DUAL PATTERN) MOUNTING HOLES ALLOW FITMENT ON INTAKES WITH SQUARE FLANGE (HOLLEY 4150 STYLE) OR LARGE FLANGE (HOLLEY DOMINATOR STYLE)
• KNURLED (HAND ADJUSTABLE) PRIMARY & SECONDARY CURB IDLE SCREWS ALLOW FOR EASY IDLE ADJUSTMENT WITHOUT THE USE OF TOOLS
• PRIMARY THROTTLE SHAFT CAPPED TO PREVENT ENTRY OF DEBRIS & CONTAMINATES
• THROTTLE SHAFT IS SLABBED & UNDERCUT FOR IMPROVED AIRFLOW
• FACTORY MACHINED ACCESSORY MOUNTING HOLE FOR EASY ADDITION OF ADJUSTABLE PRIMARY THROTTLE STOP. NEW SECONDARY PUMP CAM LEVER DESIGNED TO PROVIDE POSITIVE THROTTLE STOP ON SECONDARY SIDE
• STAINLESS STEEL ADJUSTABLE SECONDARY LINK. PROVIDES CHOICE OF 1:1 OR PROGRESSIVE SECONDARY THROTTLE ACTUATION FOR ULTIMATE CONTROL OF SECONDARY OPENING RATE
• BASEPLATE DESIGNED WITH A BOSS THAT CAN BE CONSUMER MACHINED FOR VACUUM SOURCE
• STAINLESS STEEL THROTTLE PLATES

SPECS:

• BARRELS: 4
• BILLET COLOR: HARD CORE GRAY WITH BLACK
• BOOSTER: DOWN LEG
• BRAND: HOLLEY
• CARBURETOR USE: PROFESSIONAL RACE
• CFM: 750
• CHOKE: NONE
• FINISH: HARD CORE GRAY
• FUEL: METHANOL
• FUEL INLET: DUAL
• MARINE USE: NO
• MATERIAL: ALUMINUM
• MODEL: 4150
• PRIMARY MAIN JET: 152
• PRIMARY PUMP NOZZLE SIZE: 50
• PRODUCT TYPE: CARBURETOR
• SECONDARIES: MECHANICAL
• SECONDARY MAIN JET: 152
• SECONDARY PUMP NOZZLE SIZE: 50
• SUPERCHARGED APPLICATION: NO
• THROTTLE BORE: 1.688"
• VENTURII SIZE: 1.375"

YOU CAN VIEW AND DOWNLOAD THE COMPLETE ASSEMBLY INSTRUCTION BOOKLETS FOR THIS CARBURETOR HERE.