Installation Instructions

Q: Do I need to buy any brake parts separately, or does the kit include everything?

This kit provides the mounting brackets only - you'll need to source the donor S197 (2005-2014 Mustang GT) caliper and rotor set separately, in whichever size you choose (12.5", 13.2", 14", or 15").

Q: Which rotor size should I pick for my wheels?

It depends on the wheels you're running. The smaller 12.5"/13.2" rotor options clear more wheel choices, while the 14" and especially 15" options need correspondingly larger wheels with enough inner clearance for the bigger caliper - test-fit or confirm dimensions with us before committing to the largest rotor.

Q: Will the factory S197 brake lines and parking brake cable work as-is?

No - plan to adapt or replace the brake lines and parking brake cable/bracket for your classic chassis. The S197 hardware isn't designed to bolt to 65-73 hard lines and e-brake cables without modification.

Q: How does this compare to a Wilwood big brake kit, and what wheel offset do I need?

In real-world use, customers report this S197 kit stops about the same as a comparable Wilwood setup unless you're pushing serious horsepower - the extra Wilwood cost mostly buys the name, not a meaningful stopping-power gap. Wheel needs scale with which rotor size you choose (12.5", 13.2", 14", or 15") - the larger the rotor, the more inner-barrel clearance you'll need, and that clearance depends on your specific wheel's design rather than one universal offset number. Confirm your wheel's inner clearance with us before ordering, especially for the 14" or 15" rotor options.