Find the right aluminum fuel injector bungs for custom intake manifolds and multi-port fuel systems. This guide highlights five top options, showing who each product is best for, and why they’re selected. Ideal buyers include fabricators building custom manifolds, engine builders seeking reliable weld-on bungs, and hobbyists upgrading injector fitment on LS1 or EV-style injectors. The quick reference table below summarizes the five picks for easy scanning.
| Product | Best For | Why Pick It |
|---|---|---|
| ICT Billet LS Injector Weld Bungs | Custom LS1 manifolds | Precise 0.540″ bore; 1.1″ length; EV1 injector size |
| JEGS Fuel Injector Bungs (EV1/EV6/EV14) | Multiple injector types | Versatile fit; weldable to many manifolds; 2 per pack |
| Nitrous Outlet Fuel Injector Bung – 10 Pack | Bulk, stable supply | 6061 aluminum; US-made; economical per unit |
| JEGS 14715 Fuel Injector Bungs | EV1/EV6/EV14 style | Solid 6061-T6 aluminum; 1.125″ length |
| 8 Pcs Aluminum Weld On Bung Kit – 6AN/8AN/10AN/12AN | AN fittings and varied sizes | Complete bundle; precision stepped with locating lip |
ICT Billet LS Injector Weld Bungs LS1 1.1″ Length
Best for: builders working on LS1-based custom intake manifolds with EV1 injector sizing. The bore accommodates .540″ injectors, and the overall length is 1.1″ for a compact weld-in profile. Selection reason: direct compatibility with LS1 EV1 injectors and straightforward weld-in installation. Limitation: fits specific injector bore size; verify injector type before ordering.
JEGS Fuel Injector Bungs (EV1/EV6/EV14)
Best for: fabricators needing one bung that covers EV1, EV6, and EV14 injectors. Selection reason: versatile fit across common injector types and weld-ready 6061-T6 aluminum. The dual-plane or single-plane manifolds can be accommodated. Caution: ensure the correct I.D./O.D. sizing for your manifold thickness and injector style.
Nitrous Outlet Fuel Injector Bung – 10 Pack
Best for: bulk projects or shops that need a steady supply of bungs. Selection reason: 10 pieces per pack, manufactured from 6061 aluminum in the United States. Limitation: generic EV1/EV6/EV14 compatibility should be confirmed for your exact injectors and manifold design.
JEGS 14715 Fuel Injector Bungs
Best for: users needing EV1, EV6, and EV14 compatibility in a single product. Selection reason: 6061-T6 aluminum construction with a standard 1.125″ length. Caution: check compatibility with your manifold thickness and injector bore before welding.
8 Pcs Aluminum Weld On Bung Kit
Best for: builders needing a complete set of AN bungs for fuel, oil, or coolant lines. Selection reason: complete bundle with 6AN, 8AN, 10AN, and 12AN sizes; precision CNC machined 6061-T6 aluminum with locating lip for easy TIG welding. Caution: verify hole preparation and TIG welding capabilities to avoid porosity.
Buying Guide
What material matters most? Look for 6061-T6 aluminum for durability and weldability. How many sizes do you need? A kit with multiple AN sizes or injector styles helps accommodate different manifolds. Should you choose single-style or multi-style bungs? If you plan to swap injectors often, select adaptable bungs (EV1/EV6/EV14 compatible) to reduce replacements. Are weld-in or bolt-on designs preferred? Weld-in bungs are common for custom manifolds; bolt-on options are useful for non-permanent installations. Consider piece count for projects needing multiple bungs, such as fuel rails and multi-point systems.
What about injector compatibility? Verify bore diameter and injector size (for example, .540″ bore for LS1 EV1 injectors) to ensure a proper seal and fit. For high-performance builds, choose bungs with locating lips or stepped designs to simplify alignment and welding. How do installation and maintenance compare? Welded fittings require proper welding technique; non-weld options reduce installation time but may limit customization. Finally, confirm clear packaging details and US-made options if supplier origin is important to you.
FAQ
- What is a fuel injector bung used for?
A fuel injector bung provides a welded or fitted mounting point for injectors on custom intake manifolds or other fuel components, ensuring a secure seal and correct injector alignment.
- Which bung size is right for EV1 injectors?
Look for a .540″ bore and length compatible with LS1 EV1 injectors; verify bore, length, and injector type before purchasing.
- Are weld-on bungs universal?
No. They vary by injector type, bore size, and manifold thickness. Always match the bung to your injector and manifold design.
- Should I buy a multi-pack bung kit?
Yes if you are building multiple manifolds or planning future injector changes; multi-size packs reduce ordering delays and material shortages.
- What should I check before welding a bung?
Ensure proper hole alignment, verify material thickness, and use appropriate welding technique to prevent porosity and leaks.
- Are these bungs suitable for non-weld installations?
Most listed options are weld-in; refer to product specifics for any bolt-on or clamped alternatives.