
Brake Kits is a performance upgrade option for performance customisation in Need for Speed: Underground.
The packages included brake pads, calipers, and rotors to improve the handling ratings of a car, with additional packages unlocked as the player progresses through Underground Mode.
Street (Level 1)[]

- Cost: 1,000 Bank
- Unlock: Beat event #9: "All Go, No Show!" in Underground Mode.
Contents[]
- Street Compound Brake Pads
- Steel Braided Brake Lines
- Cross Drilled Rotors
Brands[]
- Package 1: AEM, Stillen, Brembo
- Package 2: KVR Performance, NEUSPEED, Jackson Racing
- Package 3: Arospeed, HP Racing, Wilwood Engineering
Pro (Level 2)[]

- Cost: 2,000 Bank
- Unlock: Beat event #38: "Import Tuner Drift Event" in Underground Mode.
Contents[]
- Large Cross Drilled Rotors
- Race Compound Brake Pads
Brands[]
- Package 1: AEM, NEUSPEED, Jackson Racing
- Package 2: KVR Performance, Stillen, Wilwood Engineering
- Package 3: Arospeed, Brembo, HP Racing
Extreme (Level 3)[]

- Cost: 4,000 Bank
- Unlock: Beat event #80: "First Dibs" in Underground Mode.
Contents[]
- Large Cross Drilled and Slotted Rotors
- Four-piston Racing Calipers
Brands[]
- Package 1: AEM, KVR Performance, Arospeed
- Package 2: NEUSPEED, Stillen, Wilwood Engineering
- Package 3: Jackson Racing, Stillen, HP Racing
Unique[]
Unique performance parts offer vast performance improvements over all levels of any performance part, and can only be won by beating TJ's time trial events in Underground Mode.
Upon beating a time trial event, TJ will give the player a selection of unique parts to choose from as a reward. Any unique part rewards offered by TJ at the end of an event that are not chosen by the player are made available as a reward option again for the following time trial event offered by TJ.
TJ will offer the player a unique Brake Kits package upon them beating event #26: "Keep Them Coming". If the player does not select the package as their reward for the event, it is offered again as a reward for beating event #96: "Mods to the Max".