Clutch Masters MC15738-R 0.70" Bore Master Cylinder Kit for 12-25 BRZ/FR-S/86

Vehicle Fitment

• 2012-2025 Subaru BRZ (2.0 L/2.4 L, all trims, 6-speed manual)
• 2012-2016 Scion FR-S (2.0 L, 6-speed manual)
• 2013-2025 Toyota 86/GT86/GR86 (2.0 L/2.4 L, 6-speed manual)

Fitment Notes

• 0.7" bore -- replaces factory 5/8" master cylinder
• Includes remote reservoir, billet line, adjustable push rod
• Recommended pedal stop to prevent diaphragm overstroke

Features

• Billet aluminum construction -- strong and lightweight
• Removes OEM clutch delay valve for crisper engagement
• Adjustable -3 AN stainless fluid line
• Adjustable push rod with jam-nut for pedal feel tuning
• Clean engine-bay left by remote reservoir
• Available in red (standard), black, violet finishes
• Bolts on using OEM slave -- no major hydraulic upgrades needed
• Covered by a 1-year warranty on defects

Specifications

• Bore Size: 0.700" (0.70")
• Fluid Line: 13" stainless braided -3 AN
• Reservoir: Remote billet aluminum with bracket
• Push Rod: Adjustable with jam-nut; ~10-20% more travel
• Weight: ~3 lb; Warranty: 1 year (defect coverage)

Included Components

• 1x Billet aluminum master cylinder (MC15738-R)
• 1x Remote reservoir with cap and mount bracket
• 1x 13" stainless braided line (-3 AN)
• 1x Adjustable push rod + jam-nut
• 1x Installation hardware and instructions

Product Description

The Clutch Masters MC15738-R kit features a 0.70" bore master cylinder, expertly crafted to elevate clutch control in Subaru BRZ, Scion FR-S, and Toyota 86/GR86 models from 2012 through 2025. By removing the stock clutch delay valve and offering fluid line and push-rod adjustability, it dramatically sharpens clutch engagement--ideal for both street performance and track usage.

Constructed from billet aluminum and backed by a 1-year warranty, this kit installs cleanly using the existing slave cylinder. The added remote reservoir and stainless braided line maintain a tidy engine bay. Pedal feel is easily tuned via the adjustable push rod, and the kit is compatible with factory or aftermarket clutch setups. A pedal stop is advised to avoid diaphragm overstroke.