Application 2015-2020 Mustang GT This Strange rear brake kit includes: Two Piece Floating Slotted Steel Rotors – Floating design isolates rotor from hat to allow rotor growth and minimize distortion – Slots improve air flow, assist in warpage prevention, and reduce weight Four Piston Aluminum Directional Calipers with Stainless Steel Pistons – Aluminum bodies drastically reduce weight – Pistons are 1.625″ & 1.750″ to vary pressure on the pads decreasing pad taper – Stainless steel pistons are corrosion resistant – Anti-rattle clips reduce brake pad vibration and noise Billet Aluminum Caliper Mounts – One piece design eliminates spacers & bolts that require periodic maintenance Soft Metallic Brake Pads – Provides the best starting-line cold holding power – Recommended for vehicles going 150 MPH or less in the 1/4 mile Requires Drilling Existing Knuckle Holes 5/16″ x 1.375″ Deep Tapping 3/8″-16 x 1″ Deep With Other Brake Pads Hard metallic………… B1723WCM2 Note Brake hoses and lines are not included Calipers are tapped 1/8″ NPT and supplied with male 3 AN fittingsLearn More