ACT 884006P Monoloc Clutch Collar – Mitsubishi Lancer Evolution

The ACT 884006P Monoloc Clutch Collar is a performance upgrade for compatible Mitsubishi Lancer Evolution clutch release systems. Instead of relying on the conventional multi-piece wedge collar and retaining arrangement found on many pull-type pressure plates, ACT uses a strong one-piece hardened chromoly steel collar designed to improve retention, alignment and long-term reliability.

For modified Mitsubishi Evo owners, clutch reliability can become increasingly important as power, torque, clutch clamping force and driving intensity increase. Hard launches, rapid gear changes and motorsport use can place considerable stress on the release mechanism. ACT developed the Monoloc to reduce the possibility of unwanted release-bearing separation while maintaining correct interaction between the release bearing and pressure plate.

Stronger One-Piece Clutch Release Design

The standard wedge-collar arrangement used with compatible pull-type clutches consists of separate components that retain the release bearing within the pressure-plate mechanism. ACT replaces this arrangement with its carefully engineered Monoloc assembly.

The spring tension of its segmented retaining ring is designed and tested to maintain secure engagement while allowing the clutch release system to operate correctly.

This makes the ACT Monoloc collar a worthwhile clutch upgrade for Mitsubishi Evo performance builds, particularly when installing an uprated ACT clutch or another compatible pull-type pressure plate.

Hardened Chromoly Construction

ACT manufactures the Monoloc from hardened chromoly steel, giving it excellent strength and durability for demanding street, fast-road and competition use.

The material and one-piece design are intended to provide dependable service even where the clutch experiences frequent high-load operation.

Improved Release-Bearing Alignment

Correct alignment between the clutch release bearing and pressure plate is essential for reliable clutch operation.

The ACT Monoloc applies uniform loading to the release bearing and pressure plate, helping the components remain correctly aligned regardless of vehicle modification or driver input.

Benefits can include:

• Improved clutch release mechanism reliability
• Reduced risk of release-bearing detachment
• Consistent bearing-to-pressure-plate alignment
• Increased confidence during fast gear changes
• Durable construction suitable for modified vehicles
• Straightforward installation on compatible pressure plates

Ideal for Road, Track and Performance Evo Builds

ACT recommends the Monoloc concept for a wide range of applications. It is particularly suitable for Mitsubishi Lancer Evolution owners running:

• Uprated clutch kits
• Higher clamping-force pressure plates
• Tuned 4G63 engines
• Tuned 4B11T engines where the correct pressure plate is used
• Fast-road vehicles
• Track-day cars
• Sprint and hill-climb builds
• Drag and motorsport applications

It can also be fitted during a normal clutch replacement where additional release-system security is desirable.

Mitsubishi Evolution Applications

ACT’s European catalogue lists 884006P for Mitsubishi Lancer Evolution IV through Evolution X applications.

This includes the main Evo chassis families:

• Evo IV – CN9A – 2.0 4G63 Turbo
• Evo V – CP9A – 2.0 4G63 Turbo
• Evo VI – CP9A – 2.0 4G63 Turbo
• Evo VII – CT9A – 2.0 4G63 Turbo
• Evo VIII – CT9A – 2.0 4G63 Turbo
• Evo IX – CT9A – 2.0 4G63 Turbo/MIVEC
• Evo X – CZ4A – 2.0 4B11T Turbo, subject to pressure-plate design

Important Evo X Compatibility Information

Do not assume 884006P fits every Evo X.

The Evo X application is dependent on the centre/retaining system used by the pressure plate.

ACT installation information specifies a different Monoloc, 884007P, for an Evo X using the original-style pressure plate and snap-ring retaining arrangement.

The 884006P is appropriate only where the installed pressure plate uses the compatible crimp/wedge-style Monoloc arrangement.

It is therefore strongly recommended that Evo X customers identify the clutch or pressure-plate manufacturer and part number before ordering.

UK Buyer Fitment Advice

Earlier Evolution IV and V models were primarily grey/import-market vehicles rather than regular Mitsubishi UK models. The Evo VI began receiving more formal UK distribution through Ralliart, while the Evo VIII became the first Evolution with full UK factory approval.

For that reason, UK registrations alone should not be used to confirm clutch compatibility. Imported Evo IV–VII vehicles can have replacement or previously upgraded clutch assemblies that differ from their original specification.

Always confirm the pressure-plate release collar design before installation.

Key Features

• Genuine ACT – Advanced Clutch Technology performance component
• Manufacturer part number 884006P
• One-piece Monoloc clutch collar design
• Replaces compatible conventional two-piece wedge collar arrangements
• Hardened chromoly steel construction
• Designed to improve release-bearing retention
• Helps maintain uniform bearing and pressure-plate alignment
• Increased reliability during aggressive gear changes
• Suitable for performance road and motorsport applications
• Compatible with selected pull-type clutch pressure plates
• ACT Europe catalogues applications across Mitsubishi Evo IV–X
• Compatible with 4G63-powered Evo applications where correct clutch design is used
• Certain 4B11T Evo X installations supported
• Particularly useful when fitting an uprated performance clutch
• Installation follows the normal release-collar arrangement on compatible clutch systems

Technical Specifications

Manufacturer: ACT / Advanced Clutch Technology
Product: Monoloc Clutch Collar
Part Number / MPN: 884006P
SKU: 884006P
Product Type: Clutch release collar / release-bearing retaining collar
Construction: Hardened chromoly steel
Design: One-piece Monoloc
Clutch Type: Compatible pull-type clutch systems
Primary Function: Release-bearing retention and pressure-plate alignment
Recommended Use: Road, fast road, performance and motorsport
Engine Applications: 4G63 Turbo and selected 4B11T applications
Primary Mitsubishi Chassis: CN9A, CP9A, CT9A, CZ4A
Approx. Product Weight: ACT Europe lists approximately 0.05 kg product weight
Package Weight: Approximately 0.23 kg as catalogued by ACT Europe
UPC: 842385003319 where supplied under this ACT part number

Important Technical Note

Compatibility is determined by the pressure-plate/release collar design, not simply by engine or vehicle model.

Vehicle Fitment / Compatibility

Manufacturer-catalogued Mitsubishi applications

Mitsubishi Lancer Evolution IV

• CN9A
• 2.0-litre 4G63 Turbo
• Compatible clutch/pressure-plate design required

Mitsubishi Lancer Evolution V

• CP9A
• 2.0-litre 4G63 Turbo
• Compatible clutch/pressure-plate design required

Mitsubishi Lancer Evolution VI

• CP9A
• 2.0-litre 4G63 Turbo
• Compatible clutch/pressure-plate design required

Mitsubishi Lancer Evolution VII

• CT9A
• 2.0-litre 4G63 Turbo
• Compatible clutch/pressure-plate design required

Mitsubishi Lancer Evolution VIII

• CT9A
• 2.0-litre 4G63 Turbo
• Explicitly referenced by ACT installation documentation

Mitsubishi Lancer Evolution IX

• CT9A
• 2.0-litre 4G63 Turbo / MIVEC
• Explicitly referenced by ACT installation documentation

Mitsubishi Lancer Evolution X

• CZ4A
• 2.0-litre 4B11T Turbo
• Only with a compatible pressure plate/release collar arrangement
• OEM/original-style Evo X pressure plates using the snap-ring arrangement generally require ACT 884007P
• Not applicable simply because a vehicle is an Evo X

Not suitable for

• Evo X SST transmission simply on the basis of vehicle model
• Pressure plates using an incompatible centre retaining mechanism
• Applications where clutch specification cannot be confirmed

FAQ

Does ACT 884006P fit a Mitsubishi Evo VIII?

Yes. The Mitsubishi Lancer Evolution VIII CT9A is one of the applications explicitly identified in ACT’s installation documentation for the 884006P Monoloc. It uses the 2.0-litre turbocharged 4G63 engine. The installed pressure plate should nevertheless be checked if the vehicle has a non-standard clutch system.

Does ACT 884006P fit a Mitsubishi Evo IX?

Yes. ACT specifically identifies compatible pull-type Mitsubishi Evo IX applications for Monoloc 884006P. UK Evo IX FQ-300, FQ-320, FQ-340 and FQ-360 models use the 4G63 turbo engine, although clutch specification should be confirmed where an aftermarket system has previously been installed.

Does ACT 884006P fit an Evo X?

Sometimes. ACT Europe lists Evo X applications for 884006P, but compatibility depends on the pressure-plate retaining design. An Evo X using the original-style pressure plate and snap-ring system generally requires ACT 884007P instead. Contact us with your clutch or pressure-plate part number if you are unsure.

Does this fit Evo X SST models?

It should not be selected simply because the vehicle is an Evo X. The SST uses a completely different twin-clutch transmission arrangement from the conventional manual clutch system targeted by this Monoloc. Confirm the transmission and clutch system before ordering.

What does an ACT Monoloc clutch collar do?

The Monoloc retains the release bearing within a compatible pull-type clutch pressure plate. ACT’s one-piece design replaces the conventional wedge-collar arrangement and helps maintain consistent loading and alignment between the release bearing and pressure plate.

Why upgrade the standard Evo clutch collar?

On high-performance cars, aggressive shifts and increased clutch clamping loads can place additional stress on the release mechanism. The ACT Monoloc uses hardened chromoly steel and a one-piece design intended to improve retention and reliability.

Can I fit ACT 884006P with a non-ACT clutch?

Potentially, yes, provided the pressure plate uses the correct compatible wedge/crimp-type retaining arrangement. Compatibility should be determined from the clutch or pressure-plate design rather than vehicle model alone.

Should I install a Monoloc when replacing my Evo clutch?

If the new pressure plate is compatible, fitting the Monoloc while the gearbox is already removed can be sensible because access to the clutch release system is available. Always follow the clutch manufacturer’s installation procedure and have the system fitted by a competent technician.