GReddy M20xP1.5 Oil Cooler Block Adapter -10AN with Thermostat 12401190

Vehicle Fitment

• Universal - for most Acura, Honda, Mitsubishi, Subaru, and some Nissan/Infiniti applications with an M20xP1.5 oil filter thread

Fitment Notes

• Confirm your engine's oil filter thread size (M20xP1.5) matches before ordering - a separate 3/4"-16UNF version (P/N 12401187) covers most Toyota, Scion, Lexus, and Nissan/Infiniti applications
• This part supersedes and replaces the discontinued 12401119 and 12401126 adapters
• Compatible oil filters: outer diameter 80mm or less, O-ring inner diameter 52mm or more up to 76mm outer diameter

Features

• Built-in GReddy thermostat (70-80°C opening range) for proper warm-up before cooling engages
• Updated internal oil flow path optimized for both low and high temperature performance
• -10AN fittings for use with GReddy oil cooler lines and cores
• Updated screw size engraved on the center bolt for easy identification
• Key component for building a custom GReddy oil cooler kit

Specifications

• Engine Thread: M20 x P1.5
• Filter Thread: M20 x P1.5
• Fitting Size: -10AN
• Thermostat Range: 70-80°C

Included Components

• 1x Oil Cooler Block Adapter
• 1x Center Bolt

Product Description

The GReddy 12401190 is a universal M20xP1.5 oil cooler block adapter with -10AN fittings, built as a core component for custom GReddy oil cooler kits on most Acura, Honda, Mitsubishi, Subaru, and select Nissan/Infiniti engines. Its built-in thermostat opens between 70-80°C, letting the engine warm up quickly before oil is routed through the cooler.

The updated internal flow path is optimized for consistent performance across both low and high oil temperatures, and it accepts factory replacement or GReddy-sized oil filters. As a universal adapter rather than a complete application-specific kit, it's intended for building or upgrading a custom oil cooler setup - confirm your engine's filter thread size matches M20xP1.5 before ordering.