Inexpensive and includes every part except the shaft and the metal block the shaft runs through. But it does include the O-rings for that. Only complaint--as with many such things--is that they dont include any instructions. Dave Prizio has a good how-to easily findable on the web though

Richard B Verified Purchase

0-Ring Rebuild Kit For Mc-4

Worked great, as usual!

George Verified Purchase

0-Ring Rebuild Kit For Mc-4

Great, speedy service

Cliff W Verified Purchase

0-Ring Rebuild Kit For Mc-4

Great kit, had all the parts needed for a great rebuild! Thanks! Steve

Steve C Verified Purchase

Matco McrbD5 Rebuild Kit

Exactly what I needed to rebuild a small leak.

Scot T Verified Purchase

0-Ring Rebuild Kit For Mc-4

Shipped quickly and worked like a champ! What more could you ask for?

Chad H Verified Purchase

Matco McrbD5 Rebuild Kit

Excellent product. Thank you for your continuing product support with parts.

Rev. O Verified Purchase

Matco McrbD5 Rebuild Kit

OK

Donald B Verified Purchase

0-Ring Rebuild Kit For Mc-4

Super quick ! 1st class service.

Asw P Verified Purchase

0-Ring Rebuild Kit For Mc-4

Exactly what I needed. Rebuilt my cylinders and they are working perfectly!

Neil H Verified Purchase

Mc-4A Rebuild Kit McmcrbD4A

In stock at a reasonable price. Shipping was prompt, although the USPS was a little slower than it should have been for a First Class from Chicago IL to Wooster OH. No fault of Aircraft Spruce.

The kit is very complete and easy to use with the right shop tools. Aircraft Spruce shipped quickly and the kits allowed me to rebuild two master cylinders for twenty five dollars. I would purchase from them again in the future if I need another rebuild.

Good kit, has everything included

Exactly what was needed.

The exploding diagrams are on the Matco website.

As noted above diagram would be nice. My O-ring on the calipers went bad changed it and should have ordered one of these at the same time as O-ring in cylinder went bad also. Needless to say I now have a spare rebuild kit in my wheels and brakes tub at the hangar.

Great kit but would be nice if it came with exploded diagram to assure correct assembly

The kits are good value and include everything that you need except some instructions and an assembly diagram. When dismantling the master cylinder take careful note of the position of everything.

The kit was complete but an o-ring that was too small drove us crazy trying to find an air leak.

Stuart D Verified Purchase

0-Ring Rebuild Kit For Mc-4