SpooksRex Posted July 16, 2012 Share Posted July 16, 2012 I just bought an 05 STI Master cylinder and booster to do the brake upgrade + a grimmspeed MC brace to see if that helps with my spongeyness. I just got my STI MC in the mail, and it looks like it was leaking fluid between the MC & the booster. Should I be concerned of a larger issue at hand, or should I just replace the seal? Once I install this, I was going to do a brake flush also since I just put in Hawk HPS's & Powerslot rotors all around. Any info would greatly appreciated. I'm planning on doing the install on Friday, so when I go to the dealership this week to pickup the check-valvle line for the STI MC, I didn't know if I should pick up anything else. -Dan Link to comment Share on other sites More sharing options...
jamal Posted July 16, 2012 Share Posted July 16, 2012 What's more likely is that residual fluid leaked out of the open ports and dripped down onto the booster. Link to comment Share on other sites More sharing options...
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