Spec-D MG19301-XK5-00N0 Mugen Low-Temp Thermostat for Honda / Acura

The Spec-D MG19301-XK5-00N0 is a Mugen Low-Temperature Thermostat designed for Honda and Acura performance applications. Mugen, Honda's renowned motorsport and performance tuning division, engineered this thermostat to open at a lower temperature than the factory unit, allowing the engine coolant to circulate sooner and maintain a cooler operating temperature under demanding conditions.

By keeping engine temperatures lower, this thermostat helps protect against heat soak during spirited driving, track use, or in high-performance builds where additional thermal headroom is critical. It is a direct-fit, drop-in replacement designed to install in the stock thermostat housing with no modifications required.

Key Features:

• Lower opening temperature compared to OEM thermostat for improved thermal management
• Engineered by Mugen — Honda's official motorsport performance brand
• Direct OEM-style fitment for easy installation
• Helps reduce heat soak and protects engine components during high-performance use
• Ideal for track days, performance street driving, and modified Honda/Acura engines
• Manufacturer Part Number: MG19301-XK5-00N0

This Mugen low-temp thermostat is a popular upgrade for Honda enthusiasts looking to optimize engine cooling performance while maintaining reliability and OEM-quality fitment standards.