Wilwood Master Cylinder - With Reservoir

Wilwood Master Cylinder with Reservoir Specifications

Wilwood’s new GS Compact Integral Master Cylinders are an all new rebuildable design featuring a high pressure die cast aluminum body with a protective e-coat finish.

This master cylinder is most often used for hydraulic handbrake installs. It can also be used with pedal boxes.

Which Master Cylinder to Choose ?

The ideal diameter of a master cylinder is often the subject of much debate, while the answer is very simple: there is no ideal diameter! Every driver and every vehicle is different. Without going into great theoretical explanations, remember that the larger the diameter of the master cylinder, the more liquid it moves when you pull it: the stroke of the lever will therefore be shorter and firmer, the effort to be provided by your arm will be higher. It can be difficult to properly dose braking in these conditions. On the contrary, with a small diameter master cylinder, the stroke will be longer, the lever easier to pull, and more dosable.

Generally speaking, a diameter between 15.8 mm and 19.1 mm is a good compromise for all uses. Otherwise, do not hesitate to contact our technical staff for more precise information, especially if you are using large multi-piston calipers. Several master cylinders are available, offering many variations in diameter, with or without brake fluid reservoir for separate calipers dedicated to the handbrake.

Technical information

• Stem thread : 5/16" UNF
• Output thread : 3/8" UNF

Various diameters available, select above!

• 15,80 mm - 5/8"
• 17,80 mm - 7/10"
• 19,05 mm - 3/4"