Clutch Masters Master Cylinder Upgrade Kit - Black - 2015-2021 WRX, 2015-2021 STI

When upgrading your clutch, don't overlook upgrading your clutch master cylinder as well. Typically the OEM master cylinder will work just fine, but sometimes that master cylinder is getting old and tired and possibly might be leaking. Or maybe your want just a little bit more crisper pedal feel when operating your clutch. Upgrading to the Clutch Masters Billet Aluminum Master Cylinder will make sure your clutch hydraulic system is up to snuff and able to handle more aggressive driving. The other notable upgrade this kit will do for you is eliminate the clutch delay valve that is built into the factory master cylinder. The delay valve is a one way regulating valve that slows the fluid returning from the slave cylinder after you let off the clutch. This delay is especially noticeable in quick 1-2 gear shifts where you get back on the gas before the clutch is fully engaged. By getting rid of the delay valve you are able to shift quickly and the clutch is immediately engaging. On high powered cars where you want to still enable a little bit of delay or slip of the clutch to prevent the drivetrain from getting a shock, check out our tunable Flow Control Valve.     

This is a complete plug and play kit and includes everything you need to install this system. Will work with OEM slave cylinders.

On the 2015 and Up WRX and STi the clutch master cylinder uses same reservoir that feeds the brake master cylinder so we include a length of rubber hose that goes from the reservoir to the clutch master cylinder. 

NOTE Because of the wide range of adjustability on this master cylinder with the ability to adjust where the master cylinder is situated relative to the firewall and the pedal, as well as the ability to adjust the clevis on the push rod, it is highly recommended that you check the overall throw of your new master cylinder setup and make sure that you are not overthrowing the diaphragm of the clutch. You may need to setup a clutch pedal stop or make adjustments to the master cylinder housing location or push rod and clevis assembly to prevent overthrowing the diaphragm. With an OEM slave cylinder this should be difficult to do because it only has so much travel but it is something that must be consider when using our billet master cylinders. We made these master cylinders as adjustable as possible to allow users to dial in where in the clutch pedal's travel the clutch is engaging and disengaging.    

Kit includes:

• Clutch Masters 6061 Billet Aluminum Master Cylinder, (.700" Bore)
• -3an stainless steel line
• Billet aluminum master cylinder adapter and jam nut
• Barb fitting
• Rubber hose to connect factory reservoir to master cylinder
• Extended and adjustable push rod and billet clevis
• 2x banjo fittings w/ crush washers
• Jam nut tool