Clutch Master Cylinder

Clutch Master Cylinder: the piece that turns pedal effort into clutch release

The clutch master cylinder sits at the top of the hydraulic line on a manual transmission. Push the pedal, its piston pressurizes fluid, and that pressure travels to the slave cylinder to disengage the clutch so you can shift. When the bore wears or the seals leak, you get a soft pedal, a clutch that won't fully release, or a pedal that sinks to the floor. Replace it and the pedal comes back firm and the shift comes back clean. On older cable-clutch cars, a hydraulic conversion kit adds a master cylinder where there wasn't one.

What ThreePiece stocks

There are 53 clutch master cylinders and conversion kits here, priced from $38 to $569 — the current range for what's in stock, not a promise. Seven brands are represented: Exedy is the deepest with 25 products, followed by Clutch Masters at 16, then McLeod Racing, BLOX Racing, Bikers Choice, Performance Machine and AMS. Coverage runs across model years 1955 to 2024, with 42 of the products carrying specific fitment data. Top makes include Honda, Subaru, Mazda, Acura, Toyota, Dodge, Eagle, Chevrolet, Chrysler, Mitsubishi, Scion and Nissan; common vehicles are the Subaru WRX and STI, Honda Civic and Accord, Eagle Talon, Acura Integra, Mazda MX-5 Miata, RX-7 and RX-8, Toyota Celica and Camaro.

How to choose

Decide first whether you need a direct replacement or a conversion. The McLeod hydraulic conversion kit for 1964–1970 Mustang and the AMS EVO X conversion with master cylinder are full kits for their listed cars, and they sit toward the top of the price range. If you're on a motorcycle application, bore size matters for lever feel — compare the Bikers Choice 11/16 bore control kit against the 9/16 bore version. Finish-driven options like the Performance Machine 11/16 Gold Ops and the 11/16 Contour Contrast Cut cover buyers who want a specific look. Match the bore and mounting to your car or bike before you order.

What else you need with it

A master cylinder is one part of the system. If your clutch itself is worn, browse Clutch Components and Clutch Rebuild Kits, and check Flywheels if you're resurfacing at the same time. Riders replacing a bar control may also want Clutch Levers and Shift Components. See everything under the Drivetrain section.

Fitment help and ordering

Not sure which bore or kit fits your car or bike? Call 813-535-5801 before you buy. Every order ships free, and Affirm and Katapult financing is available on larger conversion kits.

Clutch Master Cylinder: the piece that turns pedal effort into clutch release

The clutch master cylinder sits at the top of the hydraulic line on a manual transmission. Push the pedal, its piston pressurizes fluid, and that pressure travels to the slave cylinder to disengage the clutch so you can shift. When the bore wears or the seals leak, you get a soft pedal, a clutch that won't fully release, or a pedal that sinks to the floor. Replace it and the pedal comes back firm and the shift comes back clean. On older cable-clutch cars, a hydraulic conversion kit adds a master cylinder where there wasn't one.

What ThreePiece stocks

There are 53 clutch master cylinders and conversion kits here, priced from $38 to $569 — the current range for what's in stock, not a promise. Seven brands are represented: Exedy is the deepest with 25 products, followed by Clutch Masters at 16, then McLeod Racing, BLOX Racing, Bikers Choice, Performance Machine and AMS. Coverage runs across model years 1955 to 2024, with 42 of the products carrying specific fitment data. Top makes include Honda, Subaru, Mazda, Acura, Toyota, Dodge, Eagle, Chevrolet, Chrysler, Mitsubishi, Scion and Nissan; common vehicles are the Subaru WRX and STI, Honda Civic and Accord, Eagle Talon, Acura Integra, Mazda MX-5 Miata, RX-7 and RX-8, Toyota Celica and Camaro.

How to choose

Decide first whether you need a direct replacement or a conversion. The McLeod hydraulic conversion kit for 1964–1970 Mustang and the AMS EVO X conversion with master cylinder are full kits for their listed cars, and they sit toward the top of the price range. If you're on a motorcycle application, bore size matters for lever feel — compare the Bikers Choice 11/16 bore control kit against the 9/16 bore version. Finish-driven options like the Performance Machine 11/16 Gold Ops and the 11/16 Contour Contrast Cut cover buyers who want a specific look. Match the bore and mounting to your car or bike before you order.

What else you need with it

A master cylinder is one part of the system. If your clutch itself is worn, browse Clutch Components and Clutch Rebuild Kits, and check Flywheels if you're resurfacing at the same time. Riders replacing a bar control may also want Clutch Levers and Shift Components. See everything under the Drivetrain section.

Fitment help and ordering

Not sure which bore or kit fits your car or bike? Call 813-535-5801 before you buy. Every order ships free, and Affirm and Katapult financing is available on larger conversion kits.