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 PROFORM's 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. All aluminum construction with natural polished finish. 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 and Double Pumper are registered trademarks of Holley 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 |
Engine Carburetor Main Body; For Use With Holley #4777 650 CFM Carb; Flows 670 |
| Description_DEF |
Carburetor Main Body |
| Description_DES |
Engine Carburetor Main Body; For Use With Holley #4777 650 CFM Carb; Flows 670 |
| Description_INV |
Carb Main Body; Holley 650 CFM |
| Description_EXT |
Engine Carburetor Main Body; For Use With Holley #4777 650 CFM Carb; Aluminum; No Air Horn; Features Adjustable Air Bleeds and High Performance Down-Leg Boosters; Comes with Gaskets and Jet Kit; Natural Polished Finish; Sold Individually |
| 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 PROFORM's 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. All aluminum construction with natural polished finish. 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 and Double Pumper are registered trademarks of Holley 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 |
Engine Carburetor Main Body; For Use With Holley #4777 650 CFM Carb; Flows 670 |
| Air Bleed Size (Inner High Speed) |
35 / 35 |
| Color |
Natural Aluminum Finish |
| Material |
Aluminum |
| Air Bleed Material |
Brass |
| Main Body Material |
Lightweight Aluminum |
| Technical Note |
Main body does not retain vacuum advance port in original metering block. |
| Discharge Nozzle Size (Primary / Secondary) |
.031 in. / .031 in. |
| Secondary Main Jet Size |
78 / .084 |
| Fuel Bowl Gaskets Included |
Yes |
| Needle & Seat |
110 |
| CFM |
650 CFM |
| Fuel Bowl Screw Gaskets Included |
Yes |
| Secondaries |
Mechanical Secondaries |
| Primary Main Jet Size |
71 / .075 |
| Category |
Carburetor Main Body |
| Fuel |
Gasoline |
| Booster Style |
Down-Leg Boosters |
| Idle/High Speed Air Bleed Sizes |
73 / 35 |
| Finish |
Natural |
| Air Bleeds Included |
Yes |
| 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! |
| Air Bleed Size (Outer Idle) |
73 / 73 |
| Length |
5.0000 |
| Width |
6.0000 |
| Height |
6.0000 |
| Weight |
6.0000 |
