Description

STM Sealed Engine Oil Catch Can for Mitsubishi Lancer Evolution X (2008–2015)

Firstly, Buy STM Sealed Engine Oil Catch Can Evo X online. Keep your Mitsubishi Lancer Evolution X crankcase ventilation system cleaner with the STM Sealed Engine Oil Catch Can Evo X. Designed for the 2008–2015 Evolution X and its 4B11T engine, this catch can uses a sealed two-chamber design to separate oil vapor and other crankcase contaminants.

The sealed layout allows you to retain the factory PCV system. It also helps keep oil from entering the intercooler piping. STM designed the system around the Evo X engine bay, so installation is clean and straightforward.

STM offers separate versions for the metal valve cover and plastic valve cover. Make sure you select the correct version for your vehicle before ordering.

STM Sealed Engine Oil Catch Can Evo X

A turbocharged engine can produce crankcase vapors during normal operation. These vapors can contain oil mist and other contaminants.

The factory PCV system manages these gases. However, some oil vapor can still travel through the intake system. A catch can provides a place for that oil and contamination to collect before it reaches the intake tract.

The STM sealed catch can takes this idea further. Its two-chamber design keeps the air paths separately contained while maintaining the factory PCV system.

Firstly, the system is designed specifically for the Evo X. It is not a universal catch can that requires a custom mounting solution.

Secondly, the sealed design keeps the crankcase ventilation system closed. This helps prevent unwanted vapors from being released into the engine bay.

Thirdly, the catch can mounts to the lower frame rail using an existing bolt location. This keeps the installation clean and leaves the can easy to access for draining.

Key Features

• STM sealed engine oil catch can
• Designed for 2008–2015 Mitsubishi Evolution X
• 4B11T engine application
• Two-chamber sealed design
• Retains the factory PCV system
• Helps reduce oil entering the intercooler piping
• TIG-welded aluminum body
• Durable wrinkle-black powdercoat
• Black aluminum fittings
• Braided nylon hose
• Rubber hose sections
• Brass drain fittings
• Built-in check valve
• Frame-rail mounting
• Existing bolt-hole installation
• Mounting hardware included
• Cushion for frame-rail mounting
• Hand-crafted and welded in New York
• Made in the USA
• STM lifetime warranty against manufacturing defects for the original purchaser

Sealed Two-Chamber Design

The main advantage of this STM catch can is its sealed design.

Many catch cans are designed to vent crankcase gases directly into the atmosphere. The STM system takes a different approach. It keeps the PCV system connected and uses two separate chambers to manage the airflow.

This helps maintain the factory-style crankcase ventilation strategy.

The system also helps keep oil out of the intercooler piping. This can be especially useful on a turbocharged 4B11T that is driven hard or modified for increased performance.

A catch can is not a guaranteed horsepower upgrade. Its main purpose is to improve crankcase oil-vapor management.

Evo X Metal and Plastic Valve Cover Options

Fitment is important when ordering this product.

STM produces two versions of the sealed catch can for the Evolution X:

• Metal Valve Cover: STM-EVOX-SCC-MVC
• Plastic Valve Cover: STM-EVOX-SCC-PVC

Both versions are designed for the 2008–2015 Mitsubishi Lancer Evolution X. However, the valve-cover fittings are different. Choose the version that matches the valve cover installed on your 4B11T engine.

If you are unsure which version you need, inspect your valve cover before ordering.

Clean Frame-Rail Mounting

STM designed the catch can to mount on the lower frame rail.

The system uses an existing bolt hole, so no cutting or drilling is required for the basic mounting installation. This gives the catch can a clean location without taking up valuable space around the top of the engine.

A soft buffer is included between the catch can and frame rail. It helps stabilize the can and protects the surrounding surface from direct contact.

The lower mounting position also provides easy access for draining the collected fluid.

Easy Drain Access

The STM catch can has a separate drain port for each chamber.

This means both chambers can be serviced independently. When draining the system, both drain fittings need to be removed because each side is sealed separately.

If the factory undertray remains installed, it may need to be removed to access the drains.

Regular inspection is important. The amount of fluid collected will vary depending on engine condition, driving style, boost level, and crankcase ventilation performance.

High-Quality Construction

STM fabricates the catch-can body from aluminum and TIG welds it in-house.

The finished body receives a durable wrinkle-black powdercoat. This gives the system a clean appearance while adding protection to the aluminum body.

STM also uses black aluminum fittings and black nylon hose. The nylon hose provides a clean installation and is less likely to scratch painted surfaces than some stainless braided lines.

The result is a catch can that looks at home in both street and performance-oriented Evo X engine bays.

Check Valve Included

The STM sealed system includes a check valve in the line going toward the intake manifold.

The check valve helps control the direction of airflow through the system. During installation, STM specifies that the arrow on the check valve should point up.

Correct hose routing and check-valve orientation are important. Always follow the manufacturer’s installation instructions.

STM Bellmouth Intake Compatibility

STM recommends installing this catch can with the STM Evo X Bellmouth Intake.

The STM intake includes the appropriate brass fitting and intake vent for the -10AN connection used by the catch-can system.

The catch can may work with other intake systems, but STM only confirms compatibility with its Bellmouth Intake.

If you are using a different aftermarket intake, check the connection size and routing before installation.

Installation

The STM sealed catch can is designed for a direct installation.

The can mounts to the lower frame rail using an existing bolt hole. The included hoses and fittings then connect the catch can to the valve cover and intake system.

The metal-valve-cover version uses a press-in aluminum valve-cover fitting. STM notes that the fitting is very tight and recommends using a small amount of epoxy or glue to help seal it.

Professional installation is recommended if you are not familiar with AN fittings or crankcase ventilation systems.

Before starting the engine, check every hose connection. Make sure the hoses are away from exhaust heat, belts, pulleys, and other moving components.

What’s Included

The exact fittings and hose configuration depend on the valve-cover version selected.

The metal valve-cover version includes the following main components:

• STM sealed catch can
• Valve-cover fitting
• -6AN rubber hose
• -6AN braided hose
• -8AN braided hose
• -10AN braided hose
• AN fittings
• -8AN check valve
• O-ring
• Two brass drain fittings
• Hose clamps
• M8 mounting bolt
• M8 flat washer
• M8 lock washer
• Frame-rail mounting buffer

The plastic-valve-cover version uses a different hose and fitting arrangement.

2008–2015 Mitsubishi Evolution X Fitment

The STM Sealed Engine Oil Catch Can is designed for the 2008–2015 Mitsubishi Lancer Evolution X.

Application

• Mitsubishi Lancer Evolution X
• Model years: 2008–2015
• Chassis: CZ4A
• Engine: 4B11T
• Transmission: GSR 5-speed or MR TC-SST
• Valve cover: Metal or plastic, depending on selected kit

The catch-can system is designed around the Evo X engine bay and factory crankcase ventilation layout.

Ideal for Performance Evo X Builds

The STM sealed catch can is a useful addition to many Evo X builds.

It can complement upgrades such as:

• Larger turbochargers
• Intercooler systems
• Performance intakes
• Upgraded exhaust systems
• Fuel system upgrades
• ECU tuning
• Track-focused engine builds

The catch can does not replace proper engine maintenance. It also does not fix excessive blow-by caused by a worn or damaged engine.

Instead, it provides another layer of oil-vapor separation within the crankcase ventilation system.

Why Choose a Sealed Catch Can?

A sealed catch can is a good option for owners who want to keep the factory PCV system functional.

It does not simply vent crankcase gases into the engine bay. Instead, the system continues to route the cleaned air through the intended ventilation path.

This makes the STM design particularly appealing for owners who want a clean engine bay and a more controlled crankcase ventilation setup.

Buy STM Sealed Engine Oil Catch Can Evo X Online

If you want a purpose-built catch can for your Mitsubishi Evolution X, the STM Sealed Engine Oil Catch Can offers a clean solution for managing crankcase oil vapor. Its two-chamber design, sealed PCV layout, frame-rail mounting, dual drains, and application-specific fittings make it a strong choice for the 4B11T platform.

Frequently Asked Questions

What Evo X models does this catch can fit?
It is designed for the 2008–2015 Mitsubishi Lancer Evolution X.

What engine does it fit?
The system is designed for the 4B11T 2.0-liter turbocharged engine.

Is the catch can sealed?
Yes. It uses a sealed two-chamber design and retains the factory PCV system.

Does STM make different versions?
Yes. STM offers separate versions for the metal and plastic Evo X valve covers.

Does installation require drilling?
No. STM states that the catch can mounts using an existing frame-rail bolt hole.

How many drain ports does it have?
Each chamber has its own drain port.

Will it help keep oil out of the intercooler piping?
Yes. STM designed the sealed system to help prevent oil from entering the intercooler piping.

Is a check valve included?
Yes. The kit includes an -8AN check valve for the intake-manifold line.

What intake does STM recommend?
STM recommends using its Evo X Bellmouth Intake because it provides the appropriate connection for the catch-can system.

Is this a horsepower upgrade?

Not directly. The primary purpose is crankcase ventilation and oil-vapor separation. For Evo X owners who want a clean, sealed crankcase ventilation system designed around the 4B11T, the STM Sealed Engine Oil Catch Can provides a purpose-built two-chamber solution with dedicated mounting and plumbing, so shop and order your STM Sealed Engine Oil Catch Can Evo X and other Mitsubishi Evo performance parts from evomotorparts.com today.