Anyone have experience with a good aftermarket MC? The "new" one I just purchased from NAPA leaks out of the reservoir grommets AND the cap. The plastic on the reservoir seems to be a lot thinner than OEM, and it flexes, and much more-so when heated by the engine bay. I'm going to go pick up a replacement tomorrow but I feel as if the same thing will happen.

 

Well, I ended up buying a ACDelco reman. I gutted it, took it's reservoir and used it to rebuild my stock aluminum master cylinder. For some reason all the delco remans are iron, and I don't like that, plus it does't appear stock for the year. At any rate, I bench bled my rebuild, installed it on the car and pressure bled it, and oh man, it's a huge difference. With these 1LE brakes it's seriously like throwing a boat anchor out the back window!

 

You can bolt in a fourth gen master cylinder. They are smaller which gives more clearance for things like adjustable strut mounts. They look better as well.