GReddy 12401182 Type-I Oil Filter Relocation Block – M20×1.5, -10AN Thermostatic Adapter

GReddy 12401182 Specifications

What Does an Oil Filter Relocation Block Do?

A conventional engine oil filter mounts directly to the engine block or a factory filter housing.

A remote oil filter system moves that filter to another location, using a compatible engine-side adapter and oil lines to connect the new filter mount to the engine’s lubrication circuit.

The GReddy 12401182 serves as the remote filter mounting point and provides connections for integrating an external oil cooler.

This arrangement can be especially useful when the factory oil filter is difficult to reach or when aftermarket engine components reduce service clearance.

It also allows builders to select an oil filter mounting location that offers better access for future maintenance.

However, a remote system introduces additional hoses, fittings, and sealing surfaces. Proper component selection and installation are essential to maintaining oil pressure and preventing leaks.

Why the Built-In Oil Thermostat Matters

Engine oil needs to reach an appropriate operating temperature to lubricate internal components effectively.

During cold starts, oil viscosity is higher, and sending all the oil through a large external cooler can delay warm-up.

The GReddy 12401182 incorporates a thermostat designed to manage the oil cooler circuit as temperatures rise.

Its approximately 70–80°C operating range helps regulate cooler flow rather than relying on a permanently unrestricted external cooling circuit.

For modified engines that experience sustained high oil temperatures, a properly sized external cooler can be a valuable addition.

But a bigger cooler isn’t always better.

Our guide to cooling system upgrades for turbocharged cars explains why oil temperature and coolant temperature must be evaluated separately, and why thermostatic control is important when adding external oil cooling capacity.

The GReddy 12401182 is designed to support that type of carefully planned oil cooling system.

Universal Fitment: What Vehicles Does GReddy 12401182 Fit?

The GReddy 12401182 is a universal component intended for custom oil filter relocation systems.

It does not have a guaranteed direct-fit year, make, and model application.

Compatibility depends on the oil filter thread, engine-side adapter, mounting location, hose routing, oil cooler configuration, and available clearance.

Compatible Engine-Side GReddy Adapters

These components connect to the engine and are sold separately.

Do not select an engine-side adapter based only on the thread diameter. The sealing surface, O-ring diameter, engine clearance, and oil passage arrangement must also be compatible.

Why -10AN Oil Lines Are Popular in Performance Builds

The GReddy 12401182 uses -10AN connections, a common size in aftermarket engine oil cooler and remote filtration systems.

Properly selected -10AN hoses and fittings can provide a suitable oil flow path for many performance applications.

However, hose size alone does not guarantee sufficient oil pressure or flow.

Line length, fitting restrictions, cooler design, engine oil pump capacity, and oil viscosity all affect the completed system.

For turbocharged engines, maintaining reliable oil pressure is especially important because the turbocharger depends on a consistent supply of pressurized oil.

Before modifying the lubrication system, our guide to checking engine health before adding boost explains how to verify oil pressure under cold and fully warmed operating conditions.

That baseline is useful when evaluating whether a newly installed remote filter and oil cooler system is working correctly.

Important: The Oil Cooler Ports Must Be Connected

One of the most important installation requirements for the GReddy 12401182 is that the oil cooler circuit cannot simply be left open or disconnected.

If you are installing the remote filter block without an external oil cooler, GReddy specifies that the cooler inlet and outlet must be connected using an appropriate bypass arrangement.

GReddy offers the optional 12009990 -10AN bypass tube for this purpose.

Never cap, plug, or leave oil passages disconnected without confirming the manufacturer’s required routing.

Incorrect oil line routing can interrupt lubrication, reduce oil pressure, and cause catastrophic engine damage.

GReddy 12401182 vs. a Basic Remote Oil Filter Mount

The GReddy Type-I is particularly useful for builders who want a remote filter mount and thermostatic cooler integration in the same system.

Installation Considerations for a Custom Oil Filter Relocation System

A properly installed remote oil filter system must maintain reliable oil flow under all engine operating conditions.

Before installation, confirm the engine’s oil filter mounting specifications and choose a compatible engine-side adapter.

Select a secure remote mounting location that provides access for filter changes while protecting the block and oil lines from exhaust heat, vibration, and road debris.

Use fittings and hoses specifically rated for engine oil pressure and operating temperature.

Route the oil lines away from moving suspension, steering, belts, pulleys, and sharp edges.

Follow GReddy’s specified oil flow direction and thermostat plumbing requirements.

After installation, account for the additional oil capacity of the hoses and cooler, verify oil pressure using an appropriate gauge, and inspect every connection for leaks.

Our guide to diagnosing engine oil leaks explains why oil cooler fittings, filter housings, adapters, and pressurized oil lines deserve special attention during troubleshooting.

A leaking remote oil filter connection can cause rapid oil loss, making careful inspection after installation essential.

Frequently Asked Questions

What vehicles fit the GReddy 12401182?

It is a universal remote oil filter block rather than a direct-fit vehicle-specific kit. Compatibility depends on the engine-side adapter, filter thread, oil plumbing, and mounting clearance.

What oil filter does the GReddy 12401182 use?

GReddy specifies an M20×1.5 threaded oil filter and identifies its OX-04 Sport Oil Filter, part number 13901104, as a compatible option.

Does the GReddy 12401182 include a thermostat?

Yes. It has an integrated thermostat operating in the approximately 70–80°C range.

Does this product include an oil cooler?

No. The external oil cooler must be purchased separately.

Does it include the engine-side oil filter adapter?

No. A compatible engine-side adapter is required and sold separately.

Can I install it without an oil cooler?

Yes, provided the oil cooler circuit is properly connected using the manufacturer’s specified bypass arrangement, such as the optional GReddy 12009990 bypass tube.

Can I add oil pressure and oil temperature sensors?

GReddy identifies part number 16400721 as an optional adapter for 1/8 PT oil pressure and temperature sensor connections.

Does an oil filter relocation system increase horsepower?

Not directly. Its primary benefits are improved service access and the ability to integrate a properly designed external oil cooling system.

Build Your Custom Oil Cooling System With GReddy

The GReddy 12401182 Type-I Oil Filter Relocation Block provides a versatile solution for enthusiasts who want to relocate their oil filter and integrate a thermostatically controlled external oil cooler.

With its M20×1.5 filter mount, -10AN connections, and built-in thermostat, it offers a practical foundation for custom lubrication systems on modified street cars, track vehicles, and engine-swap projects.

Choose GReddy 12401182 when your build requires an M20×1.5 remote oil filter mount with integrated oil cooler thermostat control.