Direct Replacement Components to turn a street carburetor into a high-performance carb: get that extra performance out of your ride in less than 30 minutes! Add up to 25-50 HP with PROFORMs 100% NEW, high-performance carburetor main body (no re-built components). Easy swap-in, swap-out installation utilizing existing metering blocks, fuel bowls, and baseplate. Involves only 14 screws. Has adjustable screw-in air bleeds, high-performance down-leg boosters. Get maximum air flow with no air horn, choke tower, or choke control. Comes with instructions, all necessary non-stick replacement gaskets, and high-performance jet kit. PROFORM is a registered trademark of Specialty Auto Parts USA, Inc. Holley's and Double Pumper's are registered trademarks of Holley's Performance Products, Inc. This product is supplied by Specialty Auto Parts USA, Inc. and it is not endorsed by any other carburetor manufacturer. Technical Note: Main body does not retain vacuum advance port in original metering block.
Specifications:
| Description_ABR |
Carb Body |
| Description_ASC |
Carburetor Main Body; For Use With Holley 850 CFM Double Pumper Model Carb |
| Description_DEF |
Carburetor Main Body |
| Description_DES |
Carburetor Main Body; For Use With Holley 850 CFM Double Pumper Model Carb |
| Description_INV |
Carburetor Main Body; Holley 850 CFM |
| Description_EXT |
Engine Carburetor Main Body; For Use With Holley 4150 850 CFM Alcohol Carb; Requires 1-3/4 Throttle Body; No Air Horn; Adjustable Air Bleeds and Hi-Perf Down-Leg Boosters; Comes With Gaskets and Jet Kit; Natural Aluminum; New; Sold Each |
| Description_SHO |
Carburetor Main Body |
| Description_MKT |
Direct Replacement Components to turn a street carburetor into a high-performance carb: get that extra performance out of your ride in less than 30 minutes! Add up to 25-50 HP with PROFORMs 100% NEW, high-performance carburetor main body (no re-built components). Easy swap-in, swap-out installation utilizing existing metering blocks, fuel bowls, and baseplate. Involves only 14 screws. Has adjustable screw-in air bleeds, high-performance down-leg boosters. Get maximum air flow with no air horn, choke tower, or choke control. Comes with instructions, all necessary non-stick replacement gaskets, and high-performance jet kit. PROFORM is a registered trademark of Specialty Auto Parts USA, Inc. Holley's and Double Pumper's are registered trademarks of Holley's Performance Products, Inc. This product is supplied by Specialty Auto Parts USA, Inc. and it is not endorsed by any other carburetor manufacturer. Technical Note: Main body does not retain vacuum advance port in original metering block. |
| Description_LAB |
Carburetor Main Body; For Use With Holley 850 CFM Double Pumper Model Carb |
| Needle & Seat |
120 |
| Material |
Aluminum |
| Air Bleed Size (Inner High Speed) |
35 / 35 |
| Color |
Natural Aluminum Finish |
| Fuel Bowl Gaskets Included |
Yes |
| Secondary Main Jet Size |
87.5 / .099 |
| Main Body Material |
Lightweight Aluminum |
| Air Bleeds Included |
Yes |
| Discharge Nozzle Size (Primary / Secondary) |
.033 in. / .033 in. |
| Air Bleed Material |
Brass |
| Booster Style |
Down-Leg Boosters |
| Idle/High Speed Air Bleed Sizes |
70 / 35 |
| Primary Main Jet Size |
78 / .084 |
| Fuel Bowl Screw Gaskets Included |
Yes |
| Air Bleed Size (Outer Idle) |
70 / 70 |
| Category |
Carbs |
| CFM |
850 CFM |
| Fuel |
Gasoline |
| Technical Note |
Main body does not retain vacuum advance port in original metering block. |
| Finish |
Natural |
| Feature/Benefit |
Direct replacement components to turn a street carburetor into a high-performance carb: get that extra performance out of your ride in less than 30 minutes! |
| Secondaries |
Mechanical Secondaries |
| Length |
5.0000 |
| Width |
9.0000 |
| Height |
14.0000 |
| Weight |
6.0000 |
