Mitsubishi OEM Water Neck for Evo 7/8/9 Part #MD363251 / 1305A017

The Mitsubishi OEM Water Neck is the factory coolant outlet designed for the Mitsubishi Lancer Evolution VII, VIII, and IX. It connects the cooling-system water outlet to the upper radiator hose and provides the correct factory coolant-flow path from the engine. Mitsubishi parts listings identify MD363251 for Evo 7/8 and 1305A017 for Evo 9. Importantly, these water-neck outlets are interchangeable across the Evo 7/8/9 applications.

Product Details

• Brand: Mitsubishi Motors Genuine OEM
• Product: Water Neck / Coolant Outlet
• Evo 7/8 OEM Part Number: MD363251
• Evo 9 OEM Part Number: 1305A017
• Mitsubishi Reference: 10113
• Application: Mitsubishi Lancer Evolution VII, VIII & IX
• Engine: Mitsubishi 4G63 / 4G63 MIVEC
• Chassis: CT9A
• Position: Engine coolant outlet
• Function: Connects the engine cooling passage to the upper radiator hose
• Type: Genuine OEM replacement water neck
• Fitment: Interchangeable across Evo 7/8/9
• Quantity: 1 water neck

Evo 7/8/9 Fitment

Mitsubishi Lancer Evolution VII — 2001–2002
Mitsubishi Lancer Evolution VIII — 2003–2005
Mitsubishi Lancer Evolution IX — 2006

The OEM listing specifically states that the water-neck outlets are interchangeable and can be used on all Evo 7/8/9 models.

Function

The water neck serves as an important connection point in the engine cooling system. It directs engine coolant toward the radiator through the upper radiator hose, allowing heated coolant to leave the engine and travel to the radiator for cooling.

A damaged, corroded, cracked, or leaking water neck can result in coolant loss and cooling-system problems. Replacing it with the correct OEM component restores the factory coolant outlet and hose connection.

OEM Part Number Cross-Reference

The Evo 7/8/9 water neck is commonly referenced under two Mitsubishi part numbers:

• MD363251 — Evo 7/8
• 1305A017 — Evo 9
• Reference: 10113

Despite the different part-number references, the OEM supplier confirms that the outlets are interchangeable across Evolution VII, VIII and IX.

Ideal For

• Evo 7/8/9 cooling-system repairs
• Replacing a damaged water neck
• Radiator replacement
• Upper radiator hose replacement
• 4G63 engine rebuilds
• Cooling-system restoration
• OEM restoration projects
• Preventative maintenance
• Replacing corroded factory coolant outlets

Related Cooling-System Components

This water neck can be used alongside other Evo 7/8/9 cooling components, including the thermostat, thermostat housing, upper radiator hose, water pump, water-pump gasket, and coolant-temperature components. The Evo 7/8/9 OEM cooling catalog groups water necks, thermostats, housings, water pumps, gaskets, O-rings and related hardware together for cooling-system service.

OEM Replacement

The Mitsubishi OEM Water Neck is an excellent choice for customers looking to maintain the original factory cooling-system configuration on an Evo 7, Evo 8, or Evo 9. Its OEM mounting and hose connection make it a direct replacement for the factory water outlet.

Brand: Mitsubishi Motors Genuine OEM
Product: Water Neck / Coolant Outlet
Evo 7/8 Part Number: MD363251
Evo 9 Part Number: 1305A017
Reference: 10113
Application: Mitsubishi Lancer Evolution VII/VIII/IX
Years: 2001–2006
Engine: 4G63 / 4G63 MIVEC
Chassis: CT9A
Quantity: 1 water neck
Type: Genuine Mitsubishi OEM Water Neck / Coolant Outlet
Fitment: Interchangeable across Evo 7/8/9