The Forged Narrow Superlite 4R big brake kit features 4-piston calipers and larger diameter rotors ranging from 12” to 14.” Each kit is compatible with OE master cylinders and ABS functions. The two piece hat and rotor design simplifies installation while also maximizing weight saving. The Superlite 4R big brake kit is popular among performance cars, trucks, SUVs, and racing applications that require enhanced brake capacity and increased durability.