Performance Parts in Need for Speed: Underground are components equipped to cars to improve their performance in events.
Performance part packages are unlocked for purchase as the player progresses through Underground Mode and beats specific events, usually unlocked by completing tournaments.
Each package is categorised as Stock, Street (Level 1), Pro (Level 2), Extreme (Level 3), and Unique. The latter offers the highest performance increase.
Players may also select between various brands for performance packages. Although each brand package does not differ in performance between each other, selecting a brand package will unlock associated brand decals.
Engine/Exhaust Package[]
Engine/Exhaust performance packages can be equipped to improve a car's acceleration rating.
Street[]
- Price: 500
- Unlock: Beat event #6: "Rookie Tournament" in Underground Mode.
Contents[]
- Cold Air Intake System
- Cat-Back Exhaust System
- Replace Headers
Brands[]
- Package 1: AEM, Aerospeed, DC Sports, Injen Technology, HKS USA
- Package 2: NEUSPEED, Jackson Racing, HP Racing, Stillen, Venom
- Package 3: Skunk2 Racing, Borla, A'PEXi, GReddy
- Package 4: 5Zigen, Skunk2 Racing, A'PEXi
Pro[]
- Price: 1,000
- Unlock: Beat event #30: "Dead Calm" in Underground Mode.
Contents[]
- Mild Camshaft & Cam Gears
- High Performance Throttle Body
- High Flow Intake Manifold
- Larger Diameter Downpipe
Brands[]
- Package 1: AEM, Jackson Racing, A'PEXi, GReddy, Venom
- Package 2: Arospeed, NEUSPEED, Skunk2 Racing, Borla, Injen Technology
- Package 3: DC Sports, HKS USA, HP Racing, Stillen
- Package 4: Scorpion Exhausts, Henshin Auto, DC Sports
Extreme[]
- Price: 2,000
- Unlock: Beat event #66: "Art Center Sprint Tourney" in Underground Mode.
Contents[]
- Replace Piston & Rods
- Racing Camshaft & Cam Gears
- Port & Polish Heads
- Blueprint the Block
- Low Restriction, High Flow Headers Installed
Brands[]
- Package 1: AEM, NEUSPEED, Jackson Racing, Venom, Arospeed
- Package 2: Greddy, Skunk2 Racing, A'PEXi, Borla, HKS USA
- Package 3: DC Sports, Injen Technology, HP Racing, Stillen
Drivetrain Package[]
Drivetrain performance packages can be equipped to improve a car's top speed rating.
Street[]
- Price: 500
- Unlock: Beat event #6: "Rookie Tournament" in Underground Mode.
Contents[]
- Short Throw Shift Kit
- Shifter Stabilizer Kit
- Replace Clutch
- Lightened Flywheel
Brands[]
- Package 1: Arospeed, Clutchmasters, Stillen
- Package 2: NEUSPEED, DC Sports, ACT
- Package 3: Jackson Racing, HKS USA, Stillen
Pro[]
- Price: 1,000
- Unlock: Beat event #30: "Dead Calm" in Underground Mode.
Contents[]
- Limited Slip Differential
- High Performance Clutch
Brands[]
- Package 1: ACT, NEUSPEED, Arospeed
- Package 2: Jackson Racing, Stillen, HKS USA
- Package 3: HKS USA, NEUSPEED, Jackson Racing
Extreme[]
- Price: 2,000
- Unlock: Beat event #66: "Art Center Sprint Tourney" in Underground Mode.
Contents[]
- Six-speed transmission
- Lightweight & Strengthen Driveshaft
Brands[]
- Package 1: DC Sports, ACT, NEUSPEED
- Package 2: Jackson Racing, Stillen, HKS USA
- Package 3: NEUSPEED, ACT, DC Sports
Tyres[]
Tyres can be equipped to improve a car's handling rating.
Street[]
- Price: 500
- Unlock: Beat event #6: "Rookie Tournament" in Underground Mode.
Contents[]
- Street Performance Tyre Package
Brands[]
- Package 1: Toyo Tire
- Package 2: Yokohama
- Package 3: Kumho Tires
Pro[]
- Price: 1,000
- Unlock: Beat event #30: "Dead Calm" in Underground Mode.
Contents[]
- Pro Performance Tyre Package
Brands[]
- Package 1: Toyo Tire
- Package 2: Yokohama
- Package 3: Kumho Tires
Extreme[]
- Price: 2,000
- Unlock: Beat event #66: "Art Center Sprint Tourney" in Underground Mode.
Contents[]
- Extreme Performance Tyre Package
Brands[]
- Package 1: Toyo Tire
- Package 2: Yokohama
- Package 3: Kumho Tires
E.C.U. & Fuel System[]
E.C.U. & Fuel System performance packages can be equipped to improve a car's acceleration and top speed ratings.
Street[]
- Price: 1,000
- Unlock: Beat event #9: "All Go, No Show!" in Underground Mode.
Contents[]
- Performance Chip
Brands[]
- Package 1: Jackson Racing, Venom, Stillen
- Package 2: AEM, GReddy, Skunk2 Racing
- Package 3: A'PEXi, Jackson Racing, Stillen
Pro[]
- Price: 2,000
- Unlock: Beat event #38: "Import Tuner Drift Event" in Underground Mode.
Contents[]
- High Flow Fuel Pump
- Adjustable Fuel Pressure Regulator
- Replace Fuel Rail
- Replace Fuel Filter
Brands[]
- Package 1: Venom, AEM, GReddy
- Package 2: Stillen, Jackson Racing, Skunk2 Racing
- Package 3: A'PEXi, Stillen, Venom
Extreme[]
- Price: 4,000
- Unlock: Beat event #80: "First Dibs" in Underground Mode.
Contents[]
- Stand Alone Engine Management Unit
- Replace Fuel Injectors
Brands[]
- Package 1: Jackson Racing, AEM, GReddy
- Package 2: Stillen, A'PEXi, Venom
- Package 3: Venom, Skunk2 Racing, Stillen
Turbo Package[]
Turbo performance packages can be equipped to improve a car's acceleration rating.
Street[]
- Price: 1,000
- Unlock: Beat event #9: "All Go, No Show!" in Underground Mode.
Contents[]
- Stage 1 Turbo Kit
Brands[]
- Package 1: HKS USA
- Package 2: GReddy
- Package 3: Stillen
- Package 4: A'PEXi
- Package 5: Turbonetics
Pro[]
- Price: 2,000
- Unlock: Beat event #38: "Import Tuner Drift Event" in Underground Mode.
Contents[]
- Stage 2 Turbo Kit with Intercooler
Brands[]
- Package 1: HKS USA
- Package 2: GReddy
- Package 3: Stillen
- Package 4: A'PEXi
- Package 5: Turbonetics
Extreme[]
- Price: 4,000
- Unlock: Beat event #80: "First Dibs" in Underground Mode.
Contents[]
- Stage 3 Turbo Kit
Brands[]
- Package 1: HKS USA
- Package 2: GReddy
- Package 3: Stillen
- Package 4: A'PEXi
- Package 5: Turbonetics
Brake Kits[]
Brake Kits can be equipped to improve a car's handling rating.
Street[]
- Price: 1,000
- 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[]
- Price: 2,000
- 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[]
- Price: 4,000
- 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
Weight Reduction Kits[]
Weight Reduction Kits can be equipped to improve a car's acceleration and handling ratings.
Street[]
- Price: 750
- Unlock: Beat event #14: "Downtown Series" in Underground Mode.
Contents[]
- Remove Rear Seats
- Remove Interior Panels
- Remove Spare Tyre
Brands[]
- Package 1: Sparco
Pro[]
- Price: 1,500
- Unlock: Beat event #48: "Get The Point!" in Underground Mode.
Contents[]
- Replace Rear and Side Windows with lightweight polycarbonate
- Replace Front Seats with Lightweight Racing Seats
Brands[]
- Package 1: Sparco
Extreme[]
- Price: 3,000
- Unlock: Beat event #91: "Eddie's Posse Part 1" in Underground Mode.
Contents[]
- Replace Doors and Trunk Lid with Lightweight materials
- Cut and Foam Fill excess Frame and Interior components
Brands[]
- Package 1: Sparco
Suspension Package[]
Suspension performance packages can be equipped to improve a car's handling rating.
Street[]
- Price: 750
- Unlock: Beat event #14: "Downtown Series" in Underground Mode.
Contents[]
- Sport Performance Springs and Shocks
- Strut Tower Bar
Brands[]
- Package 1: Arospeed, Eibach, HKS USA, Stillen
- Package 2: NEUSPEED, Skunk2 Racing, Apex Springs, Bilstein
- Package 3: H&R Springs, KONI, KYB America, HP Racing, A'PEXi
Pro[]
- Price: 1,500
- Unlock: Beat event #48: "Get The Point!" in Underground Mode.
Contents[]
- Front and Rear Sway Bar
- Front and Rear Tie Bar
- Upgrade Bushings
Brands[]
- Package 1: HKS USA, Stillen, Skunk2 Racing, KONI
- Package 2: Arospeed, NEUSPEED, Apex Springs, HP Racing
- Package 3: Eibach, Bilstein, H&R Springs, DC Sports, A'PEXi
Extreme[]
- Price: 3,000
- Unlock: Beat event #91: "Eddie's Posse Part 1" in Underground Mode.
Contents[]
- Coil Over Shock System with adjustable Pillow Mounts
Brands[]
- Package 1: Eibach, Stillen, Bilstein, KONI
- Package 2: HKS USA, NEUSPEED, Skunk2 Racing, DC Sports
- Package 3: Arospeed, Apex Springs, H&R Springs, A'PEXi, HP Racing
Nitrous Oxide Package[]
Nitrous Oxide performance packages can be equipped to improve a car's top speed and acceleration ratings.
Street[]
- Price: 750
- Unlock: Beat event #14: "Downtown Series" in Underground Mode.
Contents[]
- Dry Shot of Nitrous Oxide
Brands[]
- Package 1: Nitrous Express
- Package 2: NOS
Pro[]
- Price: 1,500
- Unlock: Beat event #48: "Get The Point!" in Underground Mode.
Contents[]
- Wet Shot of Nitrous Oxide
Brands[]
- Package 1: Nitrous Express
- Package 2: NOS
Extreme[]
- Price: 3,000
- Unlock: Beat event #91: "Eddie's Posse Part 1" in Underground Mode.
Contents[]
- Direct Port Nitrous Oxide
Brands[]
- Package 1: Nitrous Express
- Package 2: NOS
Unique Parts[]
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 invites the player to three time trial events in Underground Mode:
- Event #7: "TJ's Time Trial"
- Reward: Engine/Exhaust package, Drivetrain package, or Tyres.
- Event #26: "Keep Them Coming"
- Reward: Engine/Exhaust package, Drivetrain package, Tyres, E.C.U. & Fuel System, Turbo package, or Brake Kits.
- Event #96: "Mods to the Max"
- Reward: Engine/Exhaust package, Drivetrain package, Tyres, E.C.U. & Fuel System, Turbo package, Brake kits, Weight Reduction package, Suspension package, or Nitrous Oxide package.