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CNC machined from solid aluminum, the Mishimoto 42mm Aluminum CNC Fill Neck delivers precise coolant filling for custom radiator builds. Designed for welding onto fabricated aluminum radiators, it ensures reliable sealing and overflow management in performance applications.
Key Features
- 42mm Neck Diameter: Large opening allows fast coolant fills and easy viewing of fluid levels during maintenance.
- Cap Compatibility: Matches Mishimoto radiator caps for OEM-level sealing and pressure retention up to 30 PSI.
- CNC Machined Aluminum: High-strength construction resists corrosion and withstands high-pressure cooling systems in demanding environments.
- Weld-Ready Design: Flat mounting flange measures 60mm wide by 40mm high for secure TIG welding to custom radiator tanks.
- Intended for welding to 0.08-inch thick aluminum radiator tanks using TIG method.
- Hardware not included. torque cap to 4-5 Nm after install.
Fitment
| Fitment Basis | Universal by exact dimensions and interface |
|---|---|
| Required Verification | Size, connection, thread, orientation, quantity, clearance, and intended use |
Specifications
| Brand | Mishimoto |
|---|---|
| Manufacturer Part Number | MMFN-L |
| Product Type | Filler Necks |
| Fitment Type | Universal |
| GTIN | 748354803853 |
| Condition | New |
What's Included
One new Mishimoto filler necks identified by manufacturer part number MMFN-L. Hardware, adapters, hoses, clamps, fluids, wiring, tools, and companion parts are included only when expressly supplied for this exact part number.
About Mishimoto
Mishimoto develops automotive cooling, intake, oil-management, exhaust, drivetrain, and vehicle-accessory products. Fitment, dimensions, interfaces, and included components remain exact-part-number specific.
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Frequently Asked Questions
How do I confirm this universal Mishimoto product will fit?
Match every dimension, connection, thread, orientation, quantity, material, and available clearance to the intended application.
What specifications should I verify before ordering?
Confirm every listed dimension, connection, thread, material, finish, quantity, mounting point, and companion-part requirement for the exact part number.
What is included with this Mishimoto product?
Only the exact product and hardware expressly supplied for this part number are included. Fluids, adapters, tools, and companion components are separate unless stated otherwise.
Installation Instructions
Follow the current Mishimoto instructions and vehicle service information for part number MMFN-L. Verify every interface and clearance, work on a cool and safely supported vehicle, use the specified fluids, fasteners, seals, and torque procedures, inspect for leaks or contact, and recheck the installation after the first heat cycle.
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