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BRAND NEW HOLLEY ULTRA XP CIRCLE TRACK CARBURETOR, SHINY & BLACK FINISH, 650 CFM, MECHANICAL SECONDARIES, NO CHOKE, COMPATIBLE WITH GASOLINE

SPECIFICALLY CALIBRATED FOR CIRCLE TRACK & FEATURES ANTI-SIPHON VALVE IN MAIN BODY, HIGH CAPACITY FUEL BOWLS WITH 20% MORE FUEL CAPACITY TO ELIMINATE STARVATION, INTEGRATED FUEL SHELF TO MINIMIZE FUEL AERATION & INTERNAL BAFFLING TO CONTROL FUEL SLOSH. ALL ALUMINUM CONSTRUCTION, FULLY TUNABLE BILLET METERING BLOCKS, BILLET BASE PLATE, WEDGE FLOATS, ADJUSTABLE SECONDARY LINKAGE & KNURLED (HAND ADJUSTABLE) CURB IDLE SCREWS. 100% WET-FLOW TESTED BY HOLLEY TECHNICIANS.

NOTE: THIS CARBURETOR HAS SQUARE BORE FLANGE BOLT PATTERN. IT REPLACES 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 NEED AN ADAPTER TO INSTALL THIS CARBURETOR, SIMILAR TO MR. GASKET #1932.

FEATURES:

• CALIBRATED SPECIFICALLY FOR CIRCLE TRACK
• SET SCREW IN BASE PLATE FOR WIDE OPEN THROTTLE STOP ADJUSTMENT
• PTFE COATED THROTTLE SHAFTS RIDES IN OIL IMPREGNATED BRONZE BUSHINGS FOR SMOOTH THROTTLE ACTUATION
• ANTI-SIPHON VALVE IN MAIN BODY TO REDUCE PUMP PULLOVER
• CONTOURED VENTURRI INLET FOR BALANCED AIRFLOW FOR INCREASED HP
• AIR BLEEDS MOVED OUTWARD ALLOWING SMOOTHER TRANSITION OF AIRFLOW FROM TOP OF CARB INTO VENTURII
• METERING BLOCKS - IMPROVED DURABILITY TRUE GASKET SEALING & FULLY ADJUSTABLE (EMULSION BLEEDS, POWER VALVE CHANNEL RESTRICTORS & IDLE FEED RESTRICTORS)
• INTEGRATED IDLE BYPASS VALVE ELIMINATES NEED FOR HOLES IN THROTTLE PLATES - ALLOWS FOR PROPER ADJUSTMENT OF IDLE WHILE MAINTAINING CORRECT THROTTLE PLATE TO TRANSFER SLOT RELATIONSHIP
• DUAL 30CC ACCELERATOR PUMPS PROVIDE PERFECT AMOUNT OF FUEL FROM IDLE TO FULL THROTTLE
• FUEL BOWLS PROVIDE 20% MORE FUEL CAPACITY WHILE CONTROLLING SLOSH WITH INTERNAL BAFFLING
• CLEAR SIGHT WINDOWS ON BOTH SIDES OF BOWLS FOR FUEL LEVEL ADJUSTMENTS
• BUILT IN DRAIN PLUG IN FRONT CENTER OF BOWL FOR EASY ACCESS TO EMPTY CONTENTS
• -8 (O-RINGED) INLET THREADS OFFER VARIETY OF PLUMBING OPTIONS & CAN BE PLUMBED FROM EITHER SIDE - COMES FROM FACTORY WITH 8AN INLET FITTINGS
• 4 CORNER IDLE TO CONTROL YOUR IDLE SYSTEM
• INTERNAL PUMP PASSAGE IN METERING BLOCK EQUIPPED WITH TUNABLE BLEED OFF FOR FURTHER ACCELERATOR PUMP TUNING
• KNURLED (HAND ADJUSTABLE) PRIMARY & SECONDARY CURB IDLE SCREWS ALLOW FOR IDLE ADJUSTMENT WITHOUT TOOLS
• PRIMARY THROTTLE SHAFT CAPPED
• FACTORY MACHINED ACCESSORY MOUNTING HOLE FOR ADDITION OF ADJUSTABLE PRIMARY THROTTLE STOP. NEW SECONDARY PUMP CAM LEVER PROVIDE POSITIVE THROTTLE STOP ON SECONDARY SIDE
• SET UP WITH 1:1 THROTTLE ACTUATION
• BASEPLATE - BOSS THAT CAN BE CONSUMER MACHINED FOR VACUUM SOURCE
• INCLUDES WEDGE FLOATS

SPECS:

• BARRELS: 4
• BILLET COLOR: SHINY WITH BLACK BILLET
• BOOSTER: DOWN LEG
• CARBURETOR USE: PRO RACE CIRCLE TRACK
• CFM: 650
• CHOKE: NONE
• CIRCUIT: 2
• FUEL: GASOLINE
• FUEL INLET: DUAL
• MATERIAL: ALUMINUM
• MODEL: 4150
• PRIMARY MAIN JET: 74
• PRIMARY POWER VALVE: 6.5
• PRIMARY PUMP NOZZLE SIZE: 32
• PRODUCT TYPE: CARBURETOR
• SECONDARIES: MECHANICAL
• SECONDARY MAIN JET: 82
• SECONDARY PUMP NOZZLE SIZE: 31
• SUPERCHARGED APPLICATION: NO
• THROTTLE BORE: 1.688 INCH
• VENTURII SIZE: 1.250 INCH

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