There's a power level on an RB26DETT build where a single-plate clutch — even a quality aftermarket single-plate — stops being the right solution. You can feel it before it fails: clutch slip under hard acceleration at boost, a burning smell after aggressive launches, engagement that's never quite crisp under full load. The engine has outgrown the drivetrain's ability to transmit its output without loss. The answer is a twin-plate setup, and NISMO's Super Coppermix is the answer most serious builders arrive at.

The NISMO Super Coppermix Twin Plate Push Clutch (3002A-RS594) is designed for R32 and R33 applications — the GTS-T and the full GT-R. The twin-plate design distributes the clamping load across two friction discs rather than one, which dramatically increases the clutch's torque capacity without requiring proportionally higher pedal effort. A single high-clamping single plate that can hold the same torque as this twin-plate unit would have a pedal weight that makes city driving exhausting. The twin-plate approach achieves torque capacity without sacrificing drivability.

Coppermix: What It Means

The Coppermix friction material is NISMO's proprietary formulation — a copper-based sintered compound that handles heat far better than organic friction materials. Under repeated hard launches or sustained track use, organic clutch material degrades rapidly as temperatures climb. Coppermix maintains its friction characteristics at temperatures that would have already compromised an organic disc significantly. This is why you see Coppermix specified in endurance racing and time attack applications — environments where clutch abuse is part of the job description.

For a GT-R at 400+ WHP that sees track days, touge, or occasional drag strip use, the NISMO Super Coppermix Twin Plate is the clutch that will actually keep up with the rest of the build. At ¥266,317 it's a proper investment — but it's significantly cheaper than the gearbox damage that happens when a slipping clutch is allowed to transmit shock loads through the drivetrain.