Upgrade Kit; with Hi-Torque Steelback Disc; 9-3/8" x 1-1/8" x 21T
The M-Pact ST1 Upgrade Clutch Kit features a high torque steelback disc and is designed for stock applications or those with mild power increases. By riveting “steel to steel” this advanced steelback friction material provides additional clamping force and superior burst strength. This is an excellent clutch upgrade for street driveability.
Features:
High-torque heavy-duty steel backed friction disc provides additional clamping force and superior burst strength
Reinforced steel backing allows for better heat dissipation, delivering extended wear and quick recovery
Assembled with precision engineered components designed for increased horse power applications
Assembled with a HD retainer stamping and increased hardness hub to ensure maximum strength and reliability
Six inner and six outer heavy duty torsional dampening springs work with this assembly to minimize the shock of engagement
M-Pact Clutch Kit Comparison
Kit Level
Designed For
Friction Disc Type
Torque Capacity Increase
Clutch Pedal Feel
OE Replacement
Daily Driving / Stock Vehicles
Organic
None
OE Pedal Feel / Clamp Load
Upgrade Kit with Hi-Torque Steelback Disc
Stock Vehicles or Vehicles With Mild Power Increases
Alloy Backed Organic
10-20%
OE Pedal Feel / Clamp Load
Upgrade Kit with Hi-Torque Multi Friction Disc
Moderately Modified Vehicles or Aggressive Drivers With Stock Power Looking To Retain Smooth Engagements
Steel Backed Sintered Ceramic
20-40%
OE Pedal Feel / Clamp Load
Upgrade Kit with Hi-Torque 6 Puck Ceramic Disc
Moderately Modified Vehicles or Aggressive Drivers With Stock Power Seeking Increased Heat Tolerance
Performance Kit with Hi-Torque Multi Friction Disc
Performance Street, Track & Off-Road Applications
Dual Sprung Steel Backed Sintered Ceramic
100-175%
Stiff Pedal Feel / High Clamp Load
Performance Kit with Hi-Torque 6 Puck Ceramic Disc
Racing & Track Use
Dual Sprung 6 Puck Cera-Metallic
150-200%
Stiff Pedal Feel / High Clamp Load
Organic vs. Kevlar vs. Ceramic Friction Disc - What Is The Difference?
The Friction Disc is a vital part of any clutch. It connects the pressure plate and flywheel, and is responsible for transferring engine power to the rest of the vehicle. Clutch Kits come with several different types of friction discs, and it is important to understand the pros and cons of each material:
Clutch Disc Material
Smooth Engagement
Holding Power (Friction "Grab")
High Torque Capacity
Lifespan
Gentle To Flywheel
Organic
★★★
★
★
★★
★★★
Kevlar
★★★
★★
★★
★★★
★★★
Ceramic / Cerametallic
★
★★★
★★★
★
★
Tips & Tools For The Job
Wear a Dust Mask to protect against hazardous clutch dust. You can also spray the clutch with water prior to removal to reduce the amount of airborne dust during disassembly.
Use a Flywheel Turner to hold the flywheel in place while removing and reinstalling the pressure plate bolts.
Apply Blue Threadlocker to flywheel bolts prior to installation to prevent backing out due to the high vibrations flywheels are subject to.
Use the provided lubricant to lightly lubricate the splines of the input shaft. Over lubricating the input shaft risks lubricant transfer to the clutch friction disc and can cause clutch slippage.
Be sure to install the new clutch friction disc in the correct direction. The disc will have a "Flywheel Side" label on one side.
Organic vs. Kevlar vs. Ceramic Friction Disc - What Is The Difference?
Tips & Tools For The Job