Includes 4-pot rear caliper, master cylinder, hoses and floating-disk. This setup is used on all the current Top Kart chassis. Disk is in perfect condition as it was a spare and barely used. The brake system was working perfectly when removed but has sat for a couple of seasons and might need a rebuild but rebuild kits are very inexpensive. List on these parts is right at $1,000 Sale at $250 plus shipping. PayPal accepted.