ACT 2005 Mitsubishi Lancer HD/Race Sprung 6 Pad Clutch Kit
The ACT MR1-HDG6 is built for a 4G69-powered Mitsubishi that now makes more torque than the factory clutch was sized for: a 2004-2006 Lancer Ralliart or a 2006-2012 Eclipse GS with a turbo kit, nitrous, or a driver who launches hard at the strip or autocross. Owners usually start shopping when the stock disc begins to slip in third gear under boost or smells burnt after a few runs. This kit pairs ACT's Heavy Duty pressure plate with a 6-pad ceramic race disc, and it is meant for high horsepower street or race use rather than a stock commuter.
The 4G69 is a 2.4L SOHC four-cylinder mounted transversely, so the clutch sits between the engine and a front-drive transaxle. The MB020 pressure plate uses ACT's own diaphragm, heat treated in four stages, to raise clamp load and limit deflection at high rpm. The 6224204 disc measures 224 mm (8.8 in) and carries six ceramic pads on a spring-centered hub. Ceramic survives heat that would glaze an organic facing, and the springs still dampen torsional vibration so the transaxle is not hit with every engagement at full force.
ACT rates the kit at 350 ft-lb at the crank, 77 percent more than the OE clutch. The price of that grip is the feel: ACT describes engagement as aggressive, with harsher take-up but faster shifts, and light to moderate pedal effort. If the car is mostly a daily driver with bolt-ons, the organic street version, MR1-HDSS, is rated at 275 ft-lb and engages much more smoothly.
Rule out the hydraulics first. A low or contaminated reservoir, a weeping slave cylinder or air in the line will cause drag and hard shifts that are easy to blame on the clutch. For slip, use a loaded test: fourth gear, low rpm, full throttle, and watch the tach against road speed. Our slipping diagnosis guide walks through reading that test, and shift flare vs slip explains why a quick rpm jump is not always a worn friction surface. When the transaxle is out, check the rear main seal for oil on the flywheel before any new disc goes in.
Our listing names the 2005 Lancer. ACT's application table for MR1-HDG6 covers the 2004-2006 Lancer Ralliart 2.4L (4G69), the 2006-2012 Eclipse GS 2.4L SOHC and the 2007-2009 Eclipse Spyder GS. It is not the kit for a base or ES Lancer with the 2.0L engine, an Evolution, or a V6 Eclipse. Some cars in this range have had engine or transaxle swaps, so check what is actually under the hood. If you are unsure, send us the year and VIN before ordering and we will confirm it.
| Brand | ACT |
| Part number | MR1-HDG6 |
| Fits | ACT 2005 Mitsubishi Lancer HD/Race Sprung 6 Pad Clutch Kit |
| Vehicle fitment | Mitsubishi Lancer Hd/Race Sprung 6 (2005) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Only the Ralliart with the 2.4L 4G69. ACT lists it for the 2004-2006 Lancer Ralliart and the 2006-2012 Eclipse GS 2.4L, not the 2.0L Lancer or the Evolution.
ACT rates it at 350 ft-lb measured at the crank, 77 percent over the stock clutch.
For many owners, yes. ACT calls the engagement aggressive and recommends it for high horsepower street or race use. The MR1-HDSS organic kit is the smoother choice for a street car.
The MB020 pressure plate, 6224204 6-pad disc, RB210 release bearing and AT20 alignment tool. No flywheel or pilot bearing is included.
ACT says its Heavy Duty pressure plates typically raise pedal effort by about 15 to 40 percent, depending on the vehicle.
ACT says race discs usually only need a few hard slips to lap in the surfaces. Avoid overheating it while it seats, which can glaze the friction surfaces.
