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Good question, I asked about that - and they don't. None of the upgrades I've seen require MC changes, maybe it's less practical to do so or not required. Thinking about it if you increase the size of brakes (dia), you probably require less in terms of MC, less pedal effort etc. I guess I'll find out...
Man, those suckers are huge, and just going to fill the wheel! Interesting show when you put the new calipers against your wheel. The big reds now look, well, like micro-reds!
Ok, got an email from customs that they finally released my rotors to canada post yesterday morning (my last box - long long story... ). Picked up my wheels today (from https://turn3autosport.com) Fikse Profil 5S fronts 8.5x19 et 51 and 11x19 et 40. Nitto 235/35 front and 305/30 rear.
Trial fitting (sorry for poor cell phone pics) seems these will work, can't fit my finger between the fender and tire in the rears.
Have doused the brake line fittings with penetrant. Will finally be able to start install this weekend!
Should be ready for my next track day on July 9th
Not quite done, have the passenger front to finish and need to bleed the brakes.
Overall pretty straightforward diy, same as changing brakes/rotors and lines. Needed minor modifications to brake lines (don't think I've seen ss line that didn't need some modification to fit the factory brackets). The front bracket clips on the lines are easy to figure out. The rears are more difficult to visualize and I've never seen a pic on rennlist, so took one. Essentially a U shaped spring steel with a hole in it for the line. it doesn't come off until you disconnect the line. Problem people have with the rear line is that you really need not only a good line wrench but one that really flat to get as much purchase as possible as that bracket impacts how far you can get your wrench on - the hex head on the line is quite thin. I had a flat crow's foot type that worked well. Other option is to use a pair of pliers to flatten and bend the U away from the hex head so you can actually get your line wrench on with better purchase, just remember to bend the U back before reassembly. Also the front hats needed minor mod/drill holes/counter sink for the screws to attach it to the wheel carrier - see pic. Otherwise looks to be a very good kit!