OS Giken Mitsubishi Lancer EVO 10 4B11T Clutch Alignment Tool

Get Clutch Installs Right the First Time

Plastic alignment tools that ship with many clutch kits have enough slack to let the disc sag out of position during installation, which can cause the transmission to hang up and place stress on the clutch plates as it goes back in. The OS Giken MT071-EB Center Alignment Tool is a forged billet tool machined to imitate the actual transmission input shaft, giving techs and DIY installers a tight, accurate fit against the pilot bushing so the clutch disc stays centered while the transmission is mated back to the engine.

Key Features

• Forged billet construction, more rigid than common plastic alignment tools, MT071-EB
• Chemically heat treated for long service life in a shop environment
• Matches the 23 spline input shaft used on the CZ4A Evo X transmission
• Prevents disc sag that leads to warped plates during clutch installation
• Designed for repeated use as a professional service shop tool
• Recommended accessory for OS Giken twin plate clutch kits on this platform

Fitment Table

Specifications

What's Included

• One MT071-EB forged billet center alignment tool

About OS Giken

OS Giken is a Japanese manufacturer known for high performance clutches, differentials, and drivetrain components built to tight tolerances for both street and motorsport use. Because their clutch discs and hubs are machined so precisely, OS Giken produces dedicated alignment tools like this one so installers get the same accuracy at install time that went into building the clutch itself.

FAQ

The MT071-EB is a forged billet clutch center alignment tool made by OS Giken for the Mitsubishi Lancer Evolution X, chassis CZ4A with the 4B11T engine. It imitates the transmission input shaft to hold the clutch disc centered during installation.

Plastic tools often have enough slack to let the disc shift out of position while the transmission is being installed, which can lead to warped plates or a difficult reinstall. The billet tool holds a tighter fit against the pilot bushing.

No, it is matched to the 23 spline input shaft used specifically on the Evolution X CZ4A transmission and is not intended for the Ralliart or naturally aspirated Lancer models.

It is strongly recommended any time a clutch is installed or serviced on this platform, and OS Giken lists it as a recommended accessory alongside their twin plate clutch kits.

It is machined from forged billet material and chemically heat treated for durability under repeated shop use.

Yes, as long as the vehicle shares the same CZ4A transmission and 23 spline input shaft, shops commonly keep one on hand for repeat service work.

Yes, it is used during the clutch installation process while the transmission is separated from the engine, before final mating.

Yes, this is a machined metal component and carries a Proposition 65 warning for California residents.

Install Instructions

1. Remove the transmission and old clutch assembly per factory service procedure
2. Install the new clutch disc and pressure plate assembly onto the flywheel
3. Insert the MT071-EB through the clutch disc hub and into the pilot bushing to center the disc
4. Torque the pressure plate bolts in a star pattern while the tool holds the disc centered
5. Remove the alignment tool once the pressure plate is fully torqued
6. Reinstall the transmission, guiding it straight onto the dowels to avoid disturbing disc alignment

Prop 65 Warning

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer or reproductive harm. For more information go to www.P65Warnings.ca.gov.