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A Hybrid Twin-Disc Clutch Built for Street and Track LS-X Power
The McLeod RST HD Twin combines full-face organic friction material on one disc face with segmented ceramic friction on the other, giving it smooth street engagement along with the holding power needed for track use. This kit includes a steel flywheel matched to the 2009-and-later GM LS-X 8-bolt crank pattern with a 1-1/8 x 26 spline input shaft and 168-tooth ring gear, and is rated up to approximately 950 horsepower.
Key Features
- Hybrid twin-disc design, organic facing on one side and segmented ceramic on the other
- Rated for up to approximately 950 horsepower
- Includes a matched steel flywheel, 168-tooth ring gear
- 1-1/8 in. x 26-spline input shaft fitment
- Includes alignment tool for centering the clutch discs during installation
Fitment
| Year | Make | Model | Engine |
|---|---|---|---|
| 2009-2025 | Chevrolet | Camaro | LS-X 8-bolt crank |
| 2009-2025 | Chevrolet | Corvette | LS-X 8-bolt crank |
| 2009-2025 | Cadillac | CTS-V | LS-X 8-bolt crank |
Specifications
| Detail | Value |
|---|---|
| Manufacturer part number | 6405807MD |
| Flywheel material | Steel |
| Flywheel bolt pattern | 8-bolt crank |
| Ring gear | 168 tooth |
| Input shaft | 1-1/8 in. x 26-spline |
| Disc diameter | 9.687 in. |
| Disc material | Organic and segmented ceramic hybrid |
| Horsepower rating | Approximately 950 hp |
| Pressure plate style | Diaphragm |
What's Included
- Pressure plate
- 2 hybrid organic/ceramic clutch discs
- Floater plate
- Steel flywheel
- Alignment tool
About McLeod Racing
McLeod Racing has manufactured clutches and driveline components for performance and racing applications since 1961, supplying twin-disc and single-disc clutch systems used across drag racing, road racing, and high-performance street builds.
FAQ
What is different about the RST HD compared to the standard RST?The RST HD uses a hybrid friction combination, organic on one side of each disc and segmented ceramic on the other, for a higher horsepower rating than the standard organic-only RST while retaining reasonable street manners.
Does this kit include a flywheel?Yes, this part number includes a matched steel flywheel.
What input shaft spline does this kit use?1-1/8 in. with 26 splines.
What is the horsepower rating of this clutch?Approximately 950 horsepower.
Is this clutch suitable for daily street driving?The hybrid friction combination is designed to balance street drivability with increased holding capacity, though pedal feel will be firmer than a stock single-disc clutch.
Does this kit include an alignment tool?Yes, an alignment tool is included to help center the clutch discs during installation.
Will this fit an LS1 or LS6 flat-style flywheel car?This specific 8-bolt crank steel flywheel kit is matched to the 2009 and later LS-X 8-bolt crank pattern, verify your exact engine's bolt pattern before ordering.
Does this kit include a throwout bearing or pilot bushing?Check the current kit contents list for this exact part number, as throwout bearings and pilot bushings are sometimes sold separately on twin-disc kits.
Installation Instructions
- Support the vehicle and remove the transmission per the vehicle service manual.
- Remove the factory flywheel, pressure plate, and clutch disc assembly.
- Inspect and resurface or replace the flywheel mounting surface if not using the included flywheel.
- Install the new flywheel (if included) and torque the flywheel bolts to specification using thread locker.
- Install the floater plate, clutch discs, adapter ring, and pressure plate using the supplied alignment tool to center the discs.
- Torque the pressure plate bolts in a star pattern to the specified torque value.
- Reinstall the transmission and bleed the hydraulic clutch system if equipped.
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