Mishimoto 42mm aluminum CNC fill neck, a weld-on coolant filler neck for custom aluminum radiator builds. CNC machined from aluminum, it is designed to be welded to your project, accepts Mishimoto radiator caps, and includes a screw-in nipple for the overflow line. The larger 42mm bore suits higher coolant flow.
Specifications
| Type | Weld-on coolant fill neck |
| Size | 42mm |
| Material | CNC-machined aluminum |
| Cap compatibility | Mishimoto radiator caps |
| Overflow | Screw-in nipple included |
| Fitment | Universal / custom |
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