I know this is a really old thread but it popped up on a Google search. I just want to say to anybody seeing this post, don't be an idiot. LARGER BRAKE LINES REDUCE PRESSURE!!!!!!!!!!!!!!!!!!!!!!!!!! The increase in volume from the enlarged lines will reduce the pressure because the MC now has to move more fluid. When you increase fluid you reduce pressure. So the moron posting on here about how line size doesn't change pressure is a complete tool. Henry Rifle is flat out wrong!!!!!!!!!!!!!!!!!! Ask me how I know? Oh, I work for the largest aftermarket brake company in the county, pretty easy to figure out.