Street Master Reinforced Clutch, Porsche

Reinforced clutch built around the 964 RS single-mass layout, deliberately keeping a wide engagement band so it stays usable in traffic.

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Published fitment
964 · Carrera 2, Carrera RS
993 · See fitment notes
Recorded availability
In production. Confirm with the supplier.
Recorded price
No published price recorded

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Reported by a secondary source. Sources last accessed ; fitment is not independently verified.

DrivetrainIn productionReported by a secondary source

Manufacturing

ManufacturerOS Giken (OS技研)
Origin🇯🇵 Japan
Manufactured here
OS Giken, Japan.
ProcessCNC Machined
Additively manufacturedNo
MaterialChromoly Steel
NotesBased on the 964 RS single-mass type; other variants need additional parts. Owner reports describe pedal effort close to standard and stable idle — the usual cost of a reinforced clutch is exactly those two things, so keeping them is the design claim.

Fitment

964Carrera 2, Carrera RS
993All models

Sources

  1. 強化クラッチ「ストリートマスター」 - ポルシェ — OS技研 (OS Giken), accessed 2026-08-17