Carburettor Ultra Double Pumper 850CFM Tumble Polished Black Anodized Electric Choke Each

Holley Ultra Double Pumper Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. Three different anodized color options (red, blue, or black) allow for a personalized look while maintaining the ultra high strength and durability you get from billet. They weigh in at approximately 5 lbs. less than a comparable zinc carburetor. Holley Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as 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 for the first time on a Double Pumper, factory pre-set electric choke for easy, fast cold start-ups. The clean, polished look coupled with red, blue, or black metering blocks and throttle body will certainly set your ride apart whether you are at the show or track.

Features :
- Shiny with black anodized billet aluminum metering blocks/base plate for good looks and true gasket sealing.
- Ultra Double Pumpers feature an Optimized street/strip calibration that works out-of-the-box.
- Factory preset electric choke for easy startups.
- 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.
- Aluminium 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!
Specs :
- Barrels : 4
- Billet Color : Black
- Booster : Down Leg
- Brand : Holley
- CFM : 850
- Choke : Electric
- Emission Code : 3
- Finish : Shiny
- Fuel : Gasoline
- Fuel Inlet : Dual
- Material : Aluminium
- Model : 4150
- Primary Main Jet : 80
- Primary Power Valve : 6.5
- Primary Pump Nozzle Size : 31
- Product Type : Carburettor
- 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