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SKU: MMFN-S | UPC: 748354803846
Mishimoto 32mm Aluminum CNC Fill Neck MMFN-S Universal Custom Radiator
The Mishimoto 32mm Aluminum CNC Fill Neck provides a precise solution for custom aluminum radiator fabrication. CNC machined from billet aluminum this fill neck welds directly into your project tank and pairs with Mishimoto radiator caps for secure sealing. Its compact 32mm design includes a built-in overflow nipple for reliable coolant system integration in performance builds.
Key Features
- CNC Machined Billet Aluminum: Delivers exact dimensions and strength for leak-free performance in high-pressure cooling systems
- 32mm Inner Diameter: Matches small radiator necks common in custom compact engine swaps and race applications
- Integrated Overflow Nipple: Screw-in barb allows simple hose connection to prevent coolant overflow during operation
- Ready to Weld Design: Raw finish TIG welds seamlessly to aluminum tanks without additional machining
- Mishimoto Cap Compatibility: Threads match Mishimoto performance radiator caps for pressure-rated sealing up to 30 PSI
Product Notes
- Designed exclusively for custom fabrication projects not direct vehicle replacement
- Raw aluminum finish accepts powder coating or anodizing for custom aesthetics
- Packaged securely to prevent shipping damage on small precision components
Installation Notes
- Professional installation recommended.
- TIG weld to radiator tank using aluminum filler rod and proper heat control
- Pair with Mishimoto radiator cap and verify thread compatibility before final assembly
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | - | Custom Radiator Builds | All |
Why Choose Mishimoto?
- Mishimoto leads in automotive cooling components with decades of innovation
- Every part undergoes rigorous dyno testing for real-world reliability
- Precision CNC processes ensure consistent quality across production runs
Frequently Asked Questions
-
Q: Does this fill neck fit specific vehicles?
A: This is a universal component for custom radiator fabrication on any aluminum tank project regardless of vehicle -
Q: What material and finish does it have?
A: Constructed from billet 6061 aluminum with a raw machined finish ready for welding or custom finishing -
Q: What warranty applies and installation tips?
A: Backed by Mishimoto lifetime warranty against defects. Weld professionally and clean threads before cap installation
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective foam insert in 5 x 4 x 2 inch box
- Weight: 0.35 lbs
Filler Necks
Filler necks are the structural tubes that connect a vehicle's fuel cap opening in the body to the fuel tank below, serving as the primary refueling pathway while incorporating anti-rollover valves, vent hoses, and vapor recovery system connections required by modern emissions standards. A damaged or corroded filler neck causes fuel odor inside and outside the vehicle, difficulty seating the fuel cap, fuel cap warning lights on OBD-equipped cars, and potential fuel leak hazards that demand prompt attention. Steel and stainless steel replacement filler necks are available for most domestic and import vehicles, with exact-fit options that replicate the OEM routing and attachment bracket positions for straightforward bolt-on installation. This collection covers replacement filler neck assemblies for passenger cars, trucks, and SUVs across major makes and model years.Popular UpgradesDirect-fit replacement filler neck assemblies for popular rust-prone applications including Ford F-150, C...
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Mishimoto
Shop premium Mishimoto performance parts at Black Ops Auto Works, including Mishimoto radiators, intercoolers, oil coolers, baffled catch cans, silicone radiator hoses, thermostats, intake systems, charge pipes, transmission coolers, exhaust tips, wheel accessories, and universal cooling components. Mishimoto is a leading aftermarket brand for performance cooling, airflow, oil control, and engine bay upgrades. Whether you are building a street car, track car, tow rig, diesel truck, Jeep, off-road SUV, or daily driver, this collection helps you find Mishimoto parts by brand, vehicle application, and product category. Shop Mishimoto Cooling, Intake & Performance Parts Black Ops Auto Works carries a wide selection of Mishimoto aftermarket parts for cars, trucks, SUVs, Jeeps, diesel applications, and universal performance builds. Mishimoto Radiators & Cooling Components - performance aluminum radiators, coolant hoses, thermostats, expansion tanks, and thermal bypass solutions ...
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