245MM 1FZ P2

Technical Parameters

Product Advantage

• Steel Cover Holds Clamp Load Under Heat

Clamp load is what actually holds torque, and it collapses when a cover loses stiffness at temperature. The steel cover here is specified for exactly that reason: it resists thermal distortion, keeps its geometry through long heat-soak, and maintains consistent clamp pressure hour after hour. For a vehicle working under sustained load — towing, climbing, deep sand — stable clamp load is the difference between a clutch that holds and one that starts slipping without warning.

• Aluminum Flywheel Cuts Rotating Mass

The flywheel is where rotating weight hurts most, because it sits at the largest radius from the crank centreline. Machining it from aluminum removes mass exactly where it costs the most, so the engine spools up faster, recovers quicker between shifts and responds more precisely to throttle input. On a heavy Land Cruiser that translates into easier hill starts, cleaner low-range modulation and noticeably less driveline inertia to manage.

• Deliberate Material Split

This is not a cost decision — it is an engineering one. Load-bearing and heat-critical components are steel, where stiffness and thermal stability matter; the inertial component is aluminum, where weight matters. Each material sits where its properties actually help. The result is a clutch that stays dimensionally stable under heat while still feeling responsive, rather than trading one quality away to gain the other.

• Rigid Discs for Unfiltered Feedback

With no damping springs between friction face and hub, engagement is immediate and repeatable, and the pedal transmits exactly what the clutch is doing. That directness matters when balancing throttle and clutch on a ledge, or modulating a launch on loose ground. Fewer components also means fewer parts to fatigue under sustained abuse — which is precisely why serious competition builds prefer rigid construction over a compliant assembly.

Product Uses

• Sustained Heat Soak

Long climbs, desert crossings and loaded towing feed heat into the clutch continuously, and heat is what quietly destroys clamp load. The steel cover is specified for this condition: it resists distortion as temperature rises, holding pedal feel and bite point stable instead of letting the clutch soften mid-task. For work measured in hours rather than seconds, thermal stability is the single most valuable property a clutch can have.

• Frequent Stop-Start Under Load

Construction use, urban towing and recovery work cycle the clutch constantly — engage, slip, release, repeat, all with weight behind the vehicle. Each cycle adds heat and wear, and a cover that loses stiffness over hundreds of cycles will start slipping progressively. Steel construction tolerates this repetition without degrading, while cerametallic faces handle constant slipping without glazing, so engagement stays consistent throughout the working day.

• Low-Range High-Torque Work

In low range, gearing multiplies engine torque enormously, and a heavy vehicle needs the clutch to hold while being slipped deliberately and precisely. Torque capacity well past 900 hp​ with reserve means low-range work never approaches the ceiling, while rigid discs give unfiltered pedal feedback. You can hold the bite point exactly where you need it, which is what precise control on difficult terrain actually requires.

• High-Output Boosted Builds

Supercharged and turbocharged 1FZ-FE conversions produce torque far beyond factory output, further multiplied by low-range gearing and oversized tyres. This kit holds output well past 900 hp​ with margin remaining, so boost levels and tyre choice stop being limited by clutch capacity. The aluminum flywheel also helps a boosted engine respond faster, making power easier to deploy rather than merely available.

• Extended Expedition Travel

Vehicles operating far from workshops need serviceability as much as capacity. Individually replaceable discs and floater plates let a spare disc set be carried and fitted wherever you happen to be, while the aluminum flywheel keeps weight down on a build that is already carrying everything it owns. Serialised build records mean replacement parts match your original specification exactly, without measuring or waiting on a full kit.

• Competition and Shock Loading

Competition Cruisers land hard, regain traction violently and launch repeatedly — each event sending an instantaneous load through the driveline. Rigid construction and heavy-duty drive straps absorb that shock without deflection, while the steel cover maintains clamp load under the sudden thermal spikes repeated launches generate. Consistent bite point means the clutch holds at the exact moment grip returns, rather than slipping when drive matters most.

FAQ