Keep your Holley carburettor performing like new with the genuine Holley 37-485 Renew Kit.
Designed specifically for Holley 4150 Performance Series carburettors, this rebuild kit contains the essential service components needed to overhaul worn or leaking carburettors while maintaining factory performance and reliability.
Whether you’re rebuilding a street cruiser, muscle car, drag car or weekend race vehicle, the Holley Renew Kit provides genuine Holley quality components engineered for an exact fit. The kit also includes extra tuning parts and detailed step-by-step instructions, making it suitable for both professional workshops and experienced enthusiasts.
Perfect for servicing popular Holley Double Pumper and mechanical secondary carburettors including 600, 650, 700, 750, 800 and 850 CFM — including the legendary Holley 850 CFM Double Pumper (List 4781 Series).
Features
- Genuine Holley Performance parts
- Complete service kit for Holley 4150 carburettors
- Restores carburettor performance
- Includes accelerator pump components
- New needle and seat assemblies
- Premium gaskets and seals
- Includes performance tuning components
- Ideal for street and race applications
- Step-by-step installation instructions included
- Genuine Holley quality and fitment
What’s Included
- Accelerator pump diaphragm
- Needle and seat assemblies
- Bowl gaskets
- Metering block gaskets
- Power valve gasket
- Assorted O-rings and seals
- Check balls
- Small service hardware
- Tuning components
- Installation instructions
Contents may vary slightly depending on carburettor model.
Specifications
| Brand | Holley |
| Part Number | 37-485 |
| Product Type | Carburettor Rebuild Kit |
| Kit Type | Renew Kit |
| Carburettor Model | 4150 |
| Carburettor Type | Performance |
| Compatible CFM | 600, 650, 700, 750, 800 & 850 CFM |
| Barrel Quantity | 4 Barrel |
| Accelerator Pump Included | Yes |
| Needle & Seat Included | Yes |
| Gaskets Included | Yes |
| Float Included | No |
| Mounting Hardware Included | No |
| Warranty | Holley Limited 90-Day Warranty |
Compatible Carburettors
Suitable for many Holley Performance 4150 carburettors including 600, 650, 700, 750, 800 and 850 CFM Double Pumper, the Holley 850 CFM Double Pumper (0-4781 Series) and various Holley 4150 mechanical secondary carburettors.
Always verify your carburettor list number before ordering.
Vehicle Compatibility
Suitable for a wide range of American V8 applications: Chevrolet Small Block, Big Block and LS carburetted conversions; Ford Windsor, FE, Cleveland and Big Block; Mopar Small Block and Big Block; Pontiac, Oldsmobile, Buick and AMC V8 — street rods, muscle cars and race vehicles.
