I want to say it might depend on the clutch you are installing. I got an after market clutch in mine and i didnt have to have new quadrant. If you are running a stock quadrant then its self adjusting and there is not firewall adjuster. Stock quadrants are cheap plastic units and can brake and bend if under stress. You are way better to replace your with an aftermarket metal unit. And while u are at it get a new adjustable cable and the whole 9 yards. They are cheap and worth it. I got mine from Steeda, and the whole kit was like 100$.Do I have to install an aftermarket quadrant and firewall adjuster when replacing my clutch with an aftermarket unit. Ive been told yes by a friend but I just wanna make sure.