If your old tank is cracked, leaking or just very dirty inside and outside, it is much cheaper than OEM. However, be aware that even if you drain the old tank, you will leave a mess. Some videos show putting a towel under the old reservoir to catch the constant leak of brake fluid, but you'll still spill some fluid when the o-rings finally release the master cylinder. If I ever have to do it again, I'll wrap everything in a towel when I take the tank off the master cylinder. Call it a rookie…