Description

Mitsubishi OEM BSPT 3/8″ Plug for 4G63 & 4B11 (MD145018)

Firstly, The Mitsubishi OEM BSPT 3/8″ Plug for 4G63 & 4B11 (MD145018) is a genuine Mitsubishi factory replacement plug designed for specific engine oil-system and cylinder-block applications. This tapered 3/8-inch BSPT plug is used across Mitsubishi performance platforms, including the Lancer Evolution and DSM families, making it a useful OEM replacement for engine rebuilds, oil-filter housing servicing, and 4B11 cylinder-block assembly.

Mitsubishi part number MD145018 is identified in Mitsubishi catalog data as a tapered 3/8-inch plug. STM Tuned lists the genuine OEM plug for 1992–2006 Evolution I–IX, DSM applications, and 2008–2015 Evolution X, with the exact installation location depending on the engine and vehicle. For the Evo X 4B11 cylinder block, two plugs are used.

Mitsubishi OEM BSPT 3/8″ Plug – MD145018

Small threaded plugs play an important role in an engine’s oil passages and sealed assemblies. During an engine rebuild or oil-system conversion, the correct plug is needed to close the appropriate threaded passage while maintaining the factory configuration.

The MD145018 is specifically manufactured and cataloged as a Mitsubishi OEM tapered plug. Its 3/8-inch BSPT specification is important because BSPT and NPT threads are different standards and should not be treated as interchangeable simply because they have a similar nominal size.

For Mitsubishi 4G63 and 4B11 engine projects, using the original Mitsubishi part number provides a reliable reference when replacing a missing, damaged, or previously removed factory plug.

Key Features

• Genuine Mitsubishi OEM replacement plug
• Mitsubishi part number MD145018
• 3/8-inch BSPT tapered thread
• OEM Mitsubishi engine plug
• Used in selected 4G63 and 4B11 applications
• Used in Evo and DSM oil-system applications
• Used in the Evo X 4B11 cylinder-block assembly
• Two plugs are listed for the Evo X application
• Suitable for engine rebuilds and restoration
• Sold individually

Mitsubishi catalog information identifies the component as a tapered 3/8-inch plug, while STM Tuned lists it specifically as the OEM BSPT 3/8-inch plug for 4G63 and 4B11 applications.

Firstly: Genuine Mitsubishi OEM Construction

The main benefit of the MD145018 is that it is a genuine Mitsubishi OEM component. For an Evolution engine rebuild, maintaining the correct factory hardware can be important, particularly when restoring an oil-filter housing or assembling a cylinder block.

OEM parts also make engine documentation easier because the Mitsubishi part number can be cross-referenced with factory diagrams and parts catalogs.

This is particularly useful for enthusiasts who are rebuilding a 4G63 or 4B11 engine from individual components and need to replace small factory plugs that may have been removed or lost during disassembly.

Secondly: Correct 3/8″ BSPT Thread

The MD145018 uses a 3/8-inch BSPT tapered thread. This specification should be confirmed before installation because BSPT and NPT are different thread standards.

The Mitsubishi catalog describes MD145018 as a TAPER, 3/8 plug.

This makes the OEM part-number reference especially important when replacing the plug. Using a generic plug with a different thread standard can result in incorrect fitment or thread damage.

For a factory-style Mitsubishi engine build, the MD145018 provides the intended OEM component rather than requiring an aftermarket substitute.

Thirdly: 4G63 and 4B11 Applications

The MD145018 is particularly useful because the same Mitsubishi OEM part number appears across multiple Evolution and DSM engine applications.

For 4G63 engines, the plug is commonly associated with oil-filter housing applications. STM Tuned lists it for Evolution I–IX and DSM platforms, while Street Tuned Motorsports also identifies MD145018 as the OEM BSPT 3/8-inch plug commonly used in 1G and 2G DSM oil-filter housings.

For the 4B11 Evolution X, STM Tuned lists two MD145018 plugs in the stock cylinder-block application.

Applications

The Mitsubishi OEM MD145018 is listed for a range of Mitsubishi performance and DSM applications, including:

• Mitsubishi Lancer Evolution I–IX
• Mitsubishi Lancer Evolution X
• 4G63-powered DSM applications
• Mitsubishi Eclipse GST/GSX
• Eagle Talon TSi
• Plymouth Laser RS
• Mitsubishi Galant VR-4

STM Tuned lists vehicle fitment covering 1992–2006 Evolution I–IX, 1990–1999 Eclipse GST/GSX, 1990–1998 Talon TSi, 1990–1994 Laser RS, 1991–1992 Galant VR-4, and 2008–2015 Evolution X.

The exact location varies by application, so buyers should verify the engine diagram and VIN when necessary.

Specifications

Specification	Details
Brand	Mitsubishi OEM
Part Number	MD145018
Component	Tapered Engine Plug
Thread	3/8″ BSPT
Thread Type	Tapered
4G63 Application	Oil filter housing / engine oil-system applications
4B11 Application	Evo X cylinder block
Evo X Quantity Used	2
Quantity Sold	1 plug
Type	Genuine OEM Mitsubishi

The product is sold individually, so the required quantity should be determined from the specific engine application. STM Tuned specifically lists two MD145018 plugs for the Evo X 4B11 cylinder block.

Why Replace the OEM Engine Plug?

Threaded engine plugs can be removed during engine machining, oil-system modifications, or complete disassembly. If one is missing during reassembly, replacing it with the correct OEM part is preferable to installing an incorrectly sized or incorrectly threaded substitute.

For a 4G63 oil-filter housing, the MD145018 provides the correct Mitsubishi reference for the applicable BSPT plug. For the Evo X 4B11, it is part of the factory cylinder-block configuration.

The plug is also useful for restoration projects where maintaining original Mitsubishi hardware is important.

Buy Mitsubishi OEM MD145018 Online

If you are searching for a Mitsubishi OEM BSPT 3/8″ Plug for 4G63 & 4B11, MD145018 is the Mitsubishi OEM part number to reference. It is suitable for selected Evolution, DSM, and 4B11 engine applications and is especially useful for oil-filter housing servicing, cylinder-block assembly, engine rebuilding, and OEM restoration.

Because the same part number can be used in different locations across Mitsubishi engines, confirm the exact application and required quantity against the appropriate factory diagram before ordering.

Frequently Asked Questions

What is Mitsubishi MD145018?
MD145018 is a genuine Mitsubishi OEM tapered 3/8-inch BSPT plug used in selected Mitsubishi engine applications.

Is MD145018 BSPT or NPT?
It is identified as a 3/8-inch BSPT tapered plug. Mitsubishi catalog data specifically describes it as a 3/8-inch tapered plug.

Does MD145018 fit the 4G63?
Yes. It is listed for 4G63-powered Evolution and DSM applications and is commonly used in applicable oil-filter housings.

Does MD145018 fit the Evo X 4B11?
Yes. STM Tuned lists MD145018 for the 2008–2015 Evolution X 4B11 cylinder block, with two plugs used in that application.

How many MD145018 plugs does an Evo X use?
The Evo X application uses two MD145018 plugs according to the STM Tuned listing.

Is the plug sold individually?
Yes. The OEM plug is sold individually, so order the quantity required for your particular engine application.

Can I use a generic 3/8-inch NPT plug instead?

Do not assume that an NPT plug is interchangeable with this BSPT component. BSPT and NPT are different thread standards, so the correct thread specification and application should be verified before installation.Order the Mitsubishi OEM BSPT 3/8″ Plug for 4G63 & 4B11 (MD145018) from evomotorparts.com for your Mitsubishi Evolution or DSM engine rebuild.

Buy Mitsubishi OEM BSPT 3/8 Plug 4G63 4B11 MD145018, a genuine tapered factory plug for Evo, DSM oil-system and Evo X 4B11 applications.