Finding the right fuel injection components for a Chevy small-block can unlock improved throttle response, efficiency, and power. This guide highlights five top options, including multi-port intake manifolds, EFI-ready cams, and essential fuel system upgrades. Each product is selected for compatibility with classic SBC engines and modern EFI setups, helping you optimize performance across the RPM range.
| Product | Brand | Type | Notes | Amazon Link |
|---|---|---|---|---|
| JGhyperX 7137 Intake Manifold | JGhyperX | Multi-Port EFI Manifold | Large plenum, long tapered runners, 1500-6500 rpm | Link |
| 300-260 Intake Manifold | JGhyperX | Single Plane EFI Manifold | Enhanced air flow for higher RPM and supercharged use | Link |
| COMP CAMS XFI Cam Kit | REDLINE ENGINE SUPPLY | EFI-Optimized Cam Kit | Double roller timing, strong mid-high range power | Link |
| Holley Pump-to-Carb Fuel Line Kit | Speedway Motors | Fuel Line Kit | Steel lines with brass fittings for SBC carbs | Link |
| AUTO OCCASION Fuel Injector Seal Kit | AUTO OCCASION | Seal Kit | Compatible with common 99-07 GM injectors | Link |
JGhyperX 7137 Intake Manifold For Chevy SBC
The JGhyperX 7137 intake manifold is designed for Chevy Small Block SBC engines from 1957 to 1986, including 262/265/283/302/305/307/327/350/400 V8s. It features a large plenum and long tapered runners to maximize horsepower and broaden the torque curve across a wide rpm range (1,500–6,500). This multi-port EFI manifold supports a 90 mm throttle body bore and offers a robust EFI-ready solution for increased airflow and performance gains on SBC builds.
JGhyperX 300-260 Intake Manifold For SBC
The 300-260 intake manifold from JGhyperX is a single-plane EFI manifold compatible with Chevy Small Block SBC engines (1957–86: 262-400). EFI manifolds favor high-RPM operation and power delivery, especially when used with appropriate fuel rails. This model relocates EGR passages to outside the manifold to enable larger ports and improved air capacity, making it a good match for boosted or high-performance street applications that rely on multi-port fuel injection.
COMP CAMS XFI 268XFI Cam Kit
The COMP CAMS 12-366-4 XFI cam kit is designed for Chevy SBC engines with EFI optimization in mind. The 268°/280° advertised duration and 224°/231° duration at .050″ lift provide strong top-end power while maintaining a practical mid-range. The kit includes a true double-roller timing set, engineered to resist timing chain stretch and ensure EFI sensor accuracy during high-RPM operation. This kit targets drivers seeking increased EFI-driven performance without sacrificing low-end torque.
Holley Pump-To-Carb Steel Fuel Line Kit
This kit pairs OEM-style steel fuel lines with brass fittings for a reliable pump-to-carb connection on small-block Chevy applications. It is marketed as a robust upgrade for Holley Street Avenger carburetors on SBC engines and is suitable for classic Chevy builds that prefer durable steel lines over rubber alternatives. The kit emphasizes compatibility with a wide range of small-block Chevy setups, facilitating a clean, durable fuel-delivery path for carbureted or EFI-adapted systems.
AUTO OCCASION Fuel Injector Seal Kit
The AUTO OCCASION 8-set fuel injector repair seal kit is designed for common GM injector families used in 1999–2007 Silverado/Sierra 4.8L, 5.3L, and 6.0L engines. The kit includes micro filters, O-rings, and caps to restore injector seals and prevent leaks. It is compatible with various part numbers such as 12580681, 19421333, 25317628, and related FJ887 references, making it a practical maintenance upgrade for improved injector reliability in EFI systems.
Buying Guide: Key Factors for Small Block Chevy EFI Upgrades
- Engine compatibility: Verify bore spacing, RPM target, and whether a multi-port EFI or single-plane EFI manifold best suits your build and intended usage (street, strip, or weekend cruiser).
- Airflow and plenum design: Large plenums and longer runners improve torque across mid-to-high RPM but may impact throttle response at very low RPM. Choose based on driving expectations.
- EFI integration: Ensure the EFI manifold and cam setup are compatible with your fuel system (return vs. returnless, fuel rails, injector size, and regulator specs).
- Cam selection and timing: EFI-oriented cams—like the 268XFI profile—are tuned for EFI sensors and top-end power. Double-roller timing sets help minimize timing chain stretch at high RPM.
- Fuel system reliability: For carb-to-EFI or EFI upgrades, injector seals, pump assemblies, and line kits should meet pressure and flow requirements for your engine displacement and boost level.
- Durability and materials: Steel lines, high-quality rubber hoses, and corrosion-resistant fittings contribute to long-term reliability in street and performance applications.
- Installation and tuning: EFI components may require professional tuning or calibrated fuel maps. Factor in potential dyno or tuning costs when evaluating kits.
- Brand support and compatibility notes: Choose established brands with clear fitment data for SBC engines to reduce installation guesswork.