SPEC Clutch ST633H Stage 2+ Clutch Kit for 1986-1993 Toyota 1JZ/7M-GTE Turbo

Vehicle Fitment

• 1986-1991 Toyota Chaser (1JZ-GTE & R154) / Chaser (7M-GTE)
• 1992-1996 Toyota Soarer (7M-GTE) / Soarer (1JZ-GTE & R154)
• 1986-1993 Toyota Supra Turbo (1JZ-GTE / 7M-GTE)

Features

• Stage 2+ performance clutch kit engineered for high-power turbo applications
• Hybrid friction disc combining Kevlar and carbon/graphite materials for enhanced durability
• High-clamp pressure plate providing strong holding capacity under elevated torque
• Sprung-hub and high-torque disc assembly designed for aggressive launch and racing use
• Direct-fit replacement designed for the specified Toyota turbo engines and transmissions
• Ideal for modified turbo 1JZ or 7M-GTE setups where stock clutch is insufficient
• Designed and manufactured by SPEC Clutch for reliability in extreme driving conditions
• Torque capacity rated at approximately 500 ft-lbs at the flywheel for this kit

Specifications

• Brand: SPEC Clutch
• Part Number: ST633H
• Kit Type: Stage 2+ single-disc clutch assembly
• Torque Capacity: ~500 ft-lbs
• Disc Diameter: approx. 9.500" / 241 mm (verify for transmission)
• Input Shaft Spline: 21-spline, 1.125" diameter (verify your gearbox)
• Material: Hybrid Kevlar / Carbon-Graphite friction disc
• Fitment Vehicles: See Vehicle Fitment section above
• Note: Requires compatible flywheel, release bearing and clutch linkage -- verify all interfaces before install

Included Components

• 1x Friction disc (hybrid Kevlar / carbon-graphite)
• 1x Diaphragm-style pressure plate
• 1x Alignment tool
• Mounting hardware (bolts/springs) appropriate for application

Product Description

The SPEC Clutch ST633H Stage 2+ clutch kit is built for serious performance in high-power turbocharged Toyota 1JZ or 7M-GTE engine platforms. When the factory clutch begins to slip under aggressive driving, launches or power upgrades, this kit offers a robust solution with a hybrid friction disc, increased clamp load and a strong holding capacity of approximately 500 ft-lbs at the flywheel. It provides enhanced engagement, improved heat tolerance and sustained performance for street, strip or track builds.

Installation is intended to be direct-fit on the listed applications when paired with a compatible flywheel and release system. Because this is a high-capacity clutch kit targeted at performance builds, it's important to verify your transmission input shaft spline count, flywheel bolt pattern, starter ring gear compatibility and clutch linkage before installation. For drivers building serious turbocharged 1JZ or 7M-GTE Toyota models, the ST633H offers a high-quality clutch upgrade that bridges the gap between street usability and race-ready holding power.