Clutch Masters 01-07 Mitsubishi Lancer Evo 850 Street Twin Disc Clutch Kit w/Aluminum Flywheel

When a built 4G63T starts spinning the factory clutch, or a single-disc upgrade keeps burning out on launches, most Lancer Evolution VII, VIII and IX owners end up shopping for a twin disc. Clutch Masters 05106-TD8S-2XHV is the street version of their FX850 twin for the 2001-2007 Evo 7-9 with the six-speed gearbox. It pairs two 8.5 inch discs with a billet aluminum flywheel and converts the car to a hydraulic, push-type release, so it holds big boost without the pedal feeling like a leg press.

What the FX850 street twin does in an Evo

A twin disc doubles the friction surfaces inside the same bellhousing, which is why it can hold far more torque than a single disc of similar size without needing brutal clamp load. In the Street (TD8S) stage, Clutch Masters stacks one sprung ceramic disc directly against a rigid disc faced with their Fiber Tuff material. The sprung hub soaks up driveline shock on take-off, and the Fiber Tuff face gives a more progressive bite than a pair of all-ceramic plates. The Race stage (TD8R) swaps that second disc for another ceramic one.

The cover is machined from billet aluminum and hard anodized. Clutch Masters says it flexes about .003 inch, against as much as .030 inch for a cast or stamped cover, so more of the release bearing travel goes into actually moving the clutch. Their QR quick release system adds three spring-loaded bolts that help the floater plate separate evenly, which they say cuts internal chatter by up to 50 percent. The aluminum flywheel is billet 6061-T6, built to SFI 1.2, with a replaceable friction insert. Expect roughly 50 percent more pedal effort than stock, depending on the car.

Symptoms that point to this kit

• Rpm flaring in third or fourth gear once boost comes in, especially after a tune or turbo upgrade
• A single-disc clutch that glazes or smells after a few launches or track sessions
• Engagement point climbing toward the top of the pedal as the disc wears thin
• Chatter or shudder pulling away from a stop on a heat-spotted flywheel
• A soft or inconsistent pedal from a tired pull-type release fork and bearing

How to confirm before you buy

Make sure the clutch is the problem and not the hydraulics. Check the reservoir level and color, bleed the system, and confirm the pedal returns fully, because a slave or master that holds the clutch partly released feels exactly like slip. Look for gear oil or engine oil at the bellhousing seam, which will ruin any new disc. Then make a fourth-gear pull from low rpm and watch for engine speed running ahead of road speed. Our slipping diagnosis guide walks through the order of checks, and the manual versus automatic repair cost guide helps you budget the labor, since the gearbox and transfer case both have to come out to reach the clutch.

Fitment

Clutch Masters catalogs 05106-TD8S-2XHV for the 2001-2007 Mitsubishi Lancer Evolution 7, 8 and 9 with the 2.0L turbo and the six-speed manual. The "850" in our listing title is the clutch series, not a model name. Evo 4-6 cars use a different part number, and five-speed cars should be confirmed before ordering. If you have the five-speed, ACT's Evo 8/9 five-speed Mod-Twin HD street kit is cataloged specifically for that gearbox. Swapped transmissions are common on these cars, so send your year, VIN and gearbox details if you are not sure. More options are in our rebuild kits department.

Install notes

• The kit includes a hydraulic release bearing and converts the factory pull-type setup to push-type. Follow the Clutch Masters instructions for the conversion and set bearing clearance exactly as specified before the gearbox goes back in.
• Bolt the aluminum flywheel to a clean crank flange with new bolts and thread locker, torqued to the factory figure.
• Assemble the discs in the order shown in the instructions and center them with an alignment tool; a universal alignment tool kit is handy if the supplied one goes missing.
• With the rear driveline already out, it is a good time to inspect the center bearing and joints. An aluminum CV rear driveshaft for Evo VII-IX is a common upgrade for high-power cars.
• Bleed the hydraulics with fresh brake fluid of the grade shown on the reservoir cap, then bed the discs in with gentle driving before any hard launches.

Does 05106-TD8S-2XHV fit a five-speed Evo VIII or IX?

Clutch Masters lists this part number for the 2001-2007 Evo 7-9 with the six-speed gearbox. Evo 4-6 cars use a separate part number. If your car has the five-speed, send the VIN and gearbox details before ordering so we can confirm the right kit.

What is the difference between the Street and Race versions?

The Street stage uses one sprung ceramic disc paired with a rigid Fiber Tuff disc for a smoother take-off. The Race stage uses two ceramic discs for maximum bite and heat tolerance, with harsher engagement.

Do I need a separate flywheel or release bearing?

No. This version includes the billet aluminum flywheel and a hydraulic release bearing, and it converts the car from the factory pull-type release to push-type.

How heavy is the pedal?

Clutch Masters says its FX850 twins average about 50 percent more pedal pressure than stock, depending on the application. Most owners adapt quickly, but it is firmer than a stock clutch.

Will a twin disc be noisy at idle?

Multi-disc clutches can make some rattle with the pedal out. The Clutch Masters QR system uses spring-loaded bolts to separate the plates evenly, which the company says reduces internal chatter by up to half.

What does the kit weigh and how fast does it ship?

The complete kit ships at around 19 to 26 pounds depending on packaging. In-stock kits ship the same business day from the USA.

• How to Diagnose Transmission Slipping: Complete Troubleshooting Guide
• Automatic vs. Manual Transmission Repair Cost: What to Actually Expect
• Shift Flare vs. Slip: How to Tell Them Apart