5 Star Speed M12 x 1.5 to 1/4 Inch NPT Coolant Temperature Sensor Adapter Compatible with GM LS LS1 LSX LS3 Engine Swaps, Includes Sealing Washer

Complete your LS engine swap with the 5 Star Speed M12 x 1.5 to 1/4-Inch NPT Coolant Temperature Sensor Adapter. Designed to convert the factory M12 x 1.5 cylinder head port to a standard 1/4-inch NPT connection, this adapter allows installation of compatible aftermarket coolant temperature sensors and gauges.

Ideal for LS engine conversions, this adapter installs directly into the cylinder head and includes a sealing washer to help provide a secure, leak-resistant connection. Its durable construction is designed for long-lasting performance in street, performance, and custom engine applications.

Features:

• Compatible with GM LS engine applications including LS1, LSX, LS3, and similar engines
• Converts M12 x 1.5 male threads to 1/4-inch NPT female threads
• Installs directly into the cylinder head coolant passage
• Compatible with coolant temperature sensors measuring approximately 1.0 inch from the probe tip to the outer edge of the adapter
• Includes sealing washer for a secure, leak-resistant installation
• Durable construction for long service life

Applications:

• LS engine swaps
• Aftermarket coolant temperature gauge installations
• Cylinder head coolant passage sensor conversions
• Performance and custom engine builds

Package Includes:

• (1) M12 x 1.5 to 1/4-inch NPT coolant temperature sensor adapter
• (1) Sealing washer

Please verify your cylinder head thread size and coolant temperature sensor dimensions before purchasing to ensure proper compatibility.