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Granatelli Motor Sports, Inc.
Granatelli GM821B Billet Twin Fuel Pump Manifold & Bracket Kit – Bracket Only
Granatelli GM821B Billet Twin Fuel Pump Manifold & Bracket Kit – Bracket Only
SKU:GM821B
Low Stock—Less than 10 available
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Granatelli Motor Sports GM821B Twin Fuel Pump Manifold & Bracket Kit
Build a cleaner, more compact dual-pump fuel system without starting from scratch. The Granatelli Motor Sports GM821B combines a billet twin-pump mounting system with integrated inlet and outlet manifolds, giving performance builders a professional solution for packaging two compatible external fuel pumps into one organized assembly.
Designed for universal high-performance fuel systems, the GM821B helps simplify pump mounting and fuel-line routing while providing multiple manifold connection options for custom installations.
Fuel pumps are NOT included. Product images showing fuel pumps are for installation and fitment reference only.
A Better Way to Build a Twin-Pump System
High-output EFI and forced-induction applications often require more fuel volume than a single external pump can comfortably supply. The GM821B gives builders a compact way to mount two compatible pumps together while integrating the inlet and outlet side of the system into a clean billet manifold arrangement.
Rather than using separate pump clamps, distribution blocks, and improvised plumbing, the GM821B keeps the system consolidated into one purpose-built assembly.
Key Features & Benefits
- Twin Fuel Pump Layout: Designed to mount two compatible external fuel pumps in one compact, organized assembly.
- Integrated Inlet & Outlet Manifolds: Helps simplify fuel plumbing by bringing both pumps together through common manifold blocks.
- Billet Aluminum Construction: Provides a strong, durable foundation with the premium appearance expected in high-end performance builds.
- Flexible Plumbing Options: Multiple ORB-style manifold ports allow the system to be configured around different mounting and hose-routing requirements.
- -10AN / -8AN System Layout: Designed around a high-flow manifold configuration using a -10AN inlet side and -8AN outlet side.
- Compact Packaging: Keeps pumps, brackets, and manifold plumbing together rather than spreading components throughout the vehicle.
- Universal Performance Application: Ideal for EFI, forced-induction, race, street/strip, muscle car, restomod, and custom fuel systems.
- Professional Finished Appearance: A clean billet assembly looks far better than improvised clamps, separate distribution blocks, and pieced-together mounting hardware.
Product Specifications
| Brand | Granatelli Motor Sports |
| Part Number | GM821B |
| Product Type | Twin Fuel Pump Manifold & Bracket Kit |
| Fuel Pumps Included | No |
| Pump Capacity | 2 External Fuel Pumps |
| Manifold Inlet | -10AN |
| Manifold Outlet | -8AN |
| Manifold Port Style | ORB-Style Ports |
| Material | Billet Aluminum |
| Finish | Black |
| Application | Universal High-Performance Fuel Systems |
Ideal for Serious Performance Builds
- Turbocharged vehicles
- Supercharged vehicles
- High-horsepower EFI applications
- Street/strip builds
- Drag racing vehicles
- Muscle cars and restomods
- Hot rods
- Custom fuel-system installations
The GM821B gives you the foundation for a professional twin external fuel pump system by combining secure pump mounting with integrated high-flow manifold plumbing in one compact billet assembly.
Note: Fuel pumps are sold separately. Always verify pump dimensions, port configuration, fuel compatibility, system pressure requirements, and overall fuel-system capacity before installation.
