Read online that I could have a problem with the booster, or could be a leak in the master that’s causing the pedal to return slowly. Either way, I gotta get this fixed ASAP. Driving around with crappy brakes doesn’t really inspire much confidence.
Sorry, but I don't see where bore size is the issue with your brakes. I think something's going on with your master though. I assume you bench bled it, so I'm inclined to think your piston seal is shot.
From a company called XtremeVision. Less than $100 bucks from Amazon and I think they are available from Walmart.com for about the same price.
Installation is very easy. Pretty much just plug and play. The housing is a shade deeper than your typical 7 inch halogen, but I managed to stuff it all in the stock headlight housing with zero modification.
So far, so good. And the difference at night is dramatic.