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Mishimoto 32mm Aluminum CNC Fill Neck

SKU: MISMMFN-S

Radiator Filler Necks

MM Coolant Fill Necks...

Mishimoto 32mm Aluminum CNC Fill Neck

SKU: MISMMFN-S

Radiator Filler Necks

MM Coolant Fill Necks...

A$45.65
IN STOCK! Est Ship 3-5 days. In stock at 2 locations (more than 10 available)

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Description

Exclusive Mishimoto flash sale discount at StreetFX!

Talk about timing! This is a limited offer while stocks last on various Mishimoto part numbers. There's never been a better time to buy your Mishimoto upgrades, so what are you waiting for?!

This item is currently on sale!

Same-day payment required to secure promotional price. Promotions may end early or be extended based on stock levels or other factors.

Mishimoto 32mm Aluminum CNC Fill Neck

If you manufacture your own aluminum radiator, the Mishimoto Aluminum Coolant Fill Neck is a must-have.The Mishimoto Aluminum Coolant Fill Necks are CNC machined and ready to be welded for use with your custom project.These Aluminum Fill Necks are compatible with our Mishimoto Radiator Caps.The small Mishimoto CNC machined Aluminum Fill Neck is 32mm and includes a screw-in nipple for overflow.

Additional Information

Versatile multi-purpose fitting designed to securely connect fluid or air lines across various systems. Precision-machined for a tight, leak-resistant seal, it offers durable construction, reliable performance, and easy installation.

Application Summary

Universal Fitment

Part Type

Radiator Fitting

Product Overview

If you manufacture your own aluminum radiator, the Mishimoto Aluminum Coolant Fill Neck is a must-have. The Mishimoto Aluminum Coolant Fill Necks are CNC machined and ready to be welded for use with your custom project. These Aluminum Fill Necks are compatible with our Mishimoto Radiator Caps.

The large Mishimoto CNC machined Aluminum Fill Neck is 42mm and includes a screw-in nipple for overflow.

The small Mishimoto CNC machined Aluminum Fill Neck is 32mm and also include a screw-in nipple for overflow.


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 05:52:01

Data: v4.2 - Upd: 2026-11-09 11:32:17

Features

  • Aluminum fill neck fits with Mishimoto Radiator Cap
  • CNC machined aluminum universal small fill neck
  • Ready to be welded for custom application

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Alternate Part Number:MMFN-S
Description:Mishimoto Aluminum Fill Neck, Small
Install Difficulty:1
Material:Aluminum
OptionLabel:Small
Part Number:misMMFN-S
Feature 1:CNC machined aluminum universal small fill neck
Feature 2:Ready to be welded for custom application
Feature 3:Aluminum fill neck fits with Mishimoto Radiator Cap
Feature 4:Includes screw-in nipple for overflow
Feature 5:Mishimoto Lifetime Warranty
Size:32mm
TechSpec Material:Aluminum

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Mishimoto
StreetFX SKU misMMFN-S
SFX Item ID 4048948
Accounting SKU mis-MMFN-S
Manufacturer SKU MMFN-S
Manufacturer UPC 748354803846
Alternative References MIMMMFN-S, MIO-MMFN-S, MMFN-S

Coolant Fill Neck, Weld-On, Aluminum, 32mm Diameter, Each

Mishimoto aluminum coolant fill necks are CNC-machined and ready to be welded for use with your custom project! Offered in two sizes, these high performance fill necks include a screw-in nipple for overflow and are compatible with their high-pressure radiator caps. Customize your fabricated aluminum radiator with Mishimoto aluminum coolant fill necks.

Product Attributes
UPC748354803846
BrandMishimoto
NotesMeasurement is 32mm inner diameter at the top of the filler neck. Caps that fit are the small design for 02-07 Subaru WRX.
QuantitySold individually.
Part TypeRadiator Filler Necks
Product LineMishimoto Coolant Fill Necks
Gaskets IncludedNo
Hardware IncludedNo
Radiator Cap IncludedNo
Manufacturer's Part NumberMMFN-S
Radiator Filler Neck StyleWeld-on
Radiator Filler Neck FinishNatural
Radiator Filler Neck MaterialAluminum

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