Holley 850 Ultra Double Pumper Hard Core Gray Man. Choke

ULTRA light
Aluminum construction for 43% weight savings

ULTRA stealthy
Hard Core Gray™ anodized finish

ULTRA strong
Billet metering blocks & base plates

ULTRA cool
Black anodized billet aluminum metering blocks and base plate

ULTRA easy
Built in sight window for simple float adjustments

ULTRA fast
High-performance fuel curves

The Ultra Double Pumper™ Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061–T6 billet aluminum. They weigh in at approximately 5 lbs. less than a comparable zinc carburetor.

The new Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction; anodized billet aluminum metering blocks and base plate; 4 corner idle for precise idle control; mechanical secondaries for great performance; clear fuel level sight plugs for easy, no mess fuel level adjustments; Ford automatic transmission kickdown for use on popular Ford transmissions; four vacuum ports for all necessary vacuum accessories; and manual choke for easy, fast cold start–ups.

The clean, stealthy look coupled with Black metering blocks and throttle body will certainly set your ride apart whether you are at the show or track.

Features:

• Hard Core Gray™ w/ black anodized billet aluminum metering blocks/base plate. Casting is hard coat anodized for ultimate corrosion resistance
• Ultra Double Pumpers feature an Optimized street/strip calibration that works out-of-the-box
• Manual choke (Cable driven, hand operated) for precise cold start control
• Mechanical secondaries for awesome tire turning performance
• 4 corner idle allows you to precisely control your idle system
• Built in, clear fuel level sight glass for easy, no mess fuel level adjustments
• Aluminum construction for a 43% weight savings
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.
• Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run!

Specification

• Barrels: 4
• Billet Color: Black
• Booster Down: Leg
• CFM: 850
• Choke: Manual
• Finish: Hard Core Gray
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 80
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 31
• Product Type: 4150 Model Carburetor
• Secondaries: Mechanical
• Secondary Main Jet: 80
• Secondary Pump Nozzle Size: 31
• Supercharged Application: No
• Throttle Bore: 1.750 inch
• Vacuum Ports: 1 timed (spark) port, 2 full, and 1 PCV port