Mishimoto MMFN-L Aluminum Radiator Fill Neck Large Universal

The Mishimoto MMFN-L is a CNC-machined aluminum radiator fill neck designed for custom cooling system applications. This universal large-diameter fill neck provides a professional solution for aftermarket and custom radiator installations.

Key Features:

• CNC-machined aluminum construction for durability and corrosion resistance
• Large diameter design for improved coolant flow and filling
• Includes integrated screw-in nipple for overflow hose connection
• Weld-on design ready for custom radiator applications
• Compatible with Mishimoto radiator caps for proper sealing
• Backed by Mishimoto Lifetime Warranty

This universal fill neck is ideal for engine swaps, custom radiator setups, and performance cooling system builds. The precision-machined aluminum construction ensures a reliable seal when paired with a compatible radiator cap, while the integrated overflow fitting simplifies plumbing for closed cooling systems.