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DESCRIPTION
You are buying a brand new XTD Stage 4 performance clutch kit combined with an
XTD Ultra-Lite 10LBS chromoly flywheel.
This Stage 4 setup is designed for high-output / heavily modified applications that require stronger holding power than street clutches.
THIS LISTING FEATURES AN UNSPRUNG (RIGID HUB) CERAMIC DISC for faster engagement and maximum bite.
XTD STAGE 4 CLUTCH – CERAMIC RACE CLUTCH (6-PUCK / UNSPRUNG / RIGID HUB)
Stage 4 uses a ceramic friction racing disc designed for strong bite and improved heat resistance under heavy load.
The unsprung (rigid hub) design delivers quicker, harder engagement than sprung hub discs—ideal for track/drag use where you want maximum lock-up.
Because there are no damper springs, you may experience more chatter, noise, and drivetrain shock (especially with lightweight flywheels and stiff mounts).
KEY FEATURES
• Extreme Heavy Duty pressure plate (ductile iron / heat treated)
• Approx. 2100 lbs clamping load (varies by application)
• 6-puck ceramic UNSPRUNG racing disc (very aggressive engagement)
• Excellent heat resistance for hard launches / racing use
• Break-in: 500 miles recommended
• Professional installation recommended
WHO SHOULD USE UNSPRUNG?
Recommended for track/drag, weekend cars, and high power builds where aggressive engagement is acceptable.
If you want smoother engagement for daily driving, choose a sprung hub disc instead.
XTD ULTRA-LITE FLYWHEEL – 10LBS CHROMOLY
XTD flywheels are manufactured from high quality chromoly steel and engineered for improved engine response.
Lower flywheel weight reduces rotational inertia, helping the engine rev more freely for quicker throttle response.
CNC machining and heat treatment are used to improve durability.
BENEFITS
• Much lighter than many factory steel flywheels (10LBS)
• Faster throttle response due to reduced rotational inertia
• Strong chromoly material with CNC machining & heat treatment
Note: Lightweight flywheels may increase chatter/NVH depending on setup (mounts, engine condition, tuning, idle speed, etc.).
PERFORMANCE / NOTES (APPLICATION DEPENDENT)
• Approx support (as listed): Torque capacity 385 ft/lbs / up to 410 HP*
• Unsprung ceramic clutches may increase noise/vibration/chatter and driveline shock
• Lightweight flywheel may also increase NVH depending on mounts and engine condition
*Support varies by tune, vehicle condition, installation, and driving style.
Important: Fitment may vary if your vehicle has been swapped or modified.
Please message us with your vehicle info before ordering if you are unsure.
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