Big Brake Kit
XYZ Racing Hollow Front Brake Kit — Subaru IMPREZA STI (2002-2004)
SKU: XYZ-BRK-BKF-SU-007-FRONT
- IncludesFront axle pair (2 discs + 2 calipers)
- PositionFront
- Disc Ø304–444 mm
- Caliper pots4 / 6 / 8 / 12-pot
- Lead time10–15 working days
Fits Subaru IMPREZA STI (2002-2004)
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Caliper render for this kit:
The GD Impreza STI left the factory with one of the more credible OEM brake packages in its class, four-pot calipers on 316mm front rotors, calibrated for the AWD weight distribution and the EJ207’s turbocharged torque. That setup earns genuine respect on the road. At a circuit, through the second half of a session at Knockhill or Oulton Park, the standard hardware shows its ceiling: heat builds in the rotors, pedal sharpness softens, and the AWD confidence that had you braking later than any comparable rear-driver begins to work against the system rather than with it.
The XYZ Racing Hollow Front Brake Kit for the 2002-2004 Subaru Impreza STI is built to push that ceiling back. It is a single-axle kit, a matched pair of front calipers and two-piece floating discs for the left and right corners, with pad compound, disc style and caliper finish all chosen to reflect the full ambition of the build.
What this brake kit does for your 2002-2004 Subaru IMPREZA STI
On the GD STI, the symmetrical AWD earns trail-braking confidence a rear-driven car cannot match: you carry brake deep into a corner and the platform stays planted. That confidence has an energy cost, more heat arriving at the front rotors in a shorter time than a similar-power car on two driven wheels, and the stock hardware feels the strain across a full day’s lapping. The hollow-vane disc draws cooling air through the rotor body so heat sheds continuously, extending the braking window before fade onset, and the two-piece floating discs pair an aluminium centre bell with an iron friction ring to hold the disc true through repeated heat cycles while trimming rotating mass at the wheel. Braided stainless lines are included for a firmer pedal than rubber hoses that swell under pressure.
Three pad compounds let you calibrate friction to application. Street is the quiet, low-dust road default; Sport adds bite and heat range for fast road with the occasional track day; Racing is a full circuit compound for the sustained heat cycling of dedicated sessions where a conventional compound would fade before the session ends.
About the Hollow Front Brake Kit
The kit is positioned as a performance upgrade for cars where the standard braking hardware has reached its limit in circuit use. The hollow-vane disc draws cooling air through the rotor body, shedding heat into the airstream rather than soaking it into solid iron, and the two-piece floating discs trim rotating mass at the wheel. The calipers are hollow-body as standard for stiffness without excess weight, supplied as a left-and-right pair covering the front axle. Because the pad is selected separately, the hardware can be reconfigured through a compound change as the build evolves toward circuit work.
Discs come drilled or slotted at the same price, so you can choose on looks or wet-weather feel. Included caliper finishes are Red, Yellow, Gold, Black and Anodized Black at no extra cost, with a Custom Color to any Pantone code for a small upcharge. Premium polished-forged finishes (Titanium, Polished Gold, Polished Silver) and candy finishes (Candy Teal, Candy Blue, Candy Red, Candy Orange) sit in a separate upgrade tier. Two-tone centre bells in five anodized colours, or a titanium bell, are selectable at checkout. For serious track use there is an optional Hollow Racing caliper, run without a dust cover, rated to 1000C and backed by a two-year warranty.
Fitment for the Subaru IMPREZA STI (2002-2004)
This front brake kit is listed for the Subaru Impreza STI across the 2002 to 2004 model year span and fits the front axle as a left-and-right pair. The listing is STI-specific, so if your car is a standard WRX, a non-STI Impreza, or sits outside this year window, verify fitment before ordering. The rear kit is a separate listing, as year spans and mounting specifications can differ between axles.
What buyers also search for
- Subaru Impreza STI front brake upgrade for track days and sustained fast-road use
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- Subaru Impreza STI 2002 2003 2004 uprated front brakes with selectable pad compound
- Impreza STI front brake kit with caliper finish choice including Red, Gold and custom Pantone
The Hollow front big brake kit for the 2002-2004 Impreza STI is available to order direct. Choose your pad compound, disc style and caliper finish when you order to build the kit to your spec.
What’s in the kit
Front axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 304–444 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 4 / 6 / 8 / 12-pot
- 2×High-stiffness mounting brackets
- 2×Braided stainless steel brake lines
- 4×High-performance brake pads (1 set)
- 1×Fitting hardware & tools pack
Choosing your spec
Every kit is built to order around the choices you make above. Here is what each option actually changes, so you can spec yours with confidence.
Brake pads — Street, Sport or Racing
Every kit ships with a full set of high-performance pads; the compound is your call.
Street is the right default for fast-road driving — a strong, progressive cold bite with low noise, low dust and long disc life. Sport raises the working temperature and adds bite and fade resistance for hard road use and the occasional track day, while still behaving on a cold morning. Racing is a track compound built for sustained abuse: huge fade resistance and bite once heat is in it, at the cost of more noise and dust when cold. Match the pad to how hard you actually use the brakes — there is no benefit to a race pad that never gets up to temperature.
Caliper grade — Hollow vs Hollow Racing
Hollow is the standard caliper on every kit: a hollow-body forged caliper, lighter than a solid one, fitted with a dust cover and backed by a 5-year oil-leak warranty. For most fast-road and spirited track use it is all the caliper you need.
Hollow Racing is the track-grade upgrade. It runs the same hollow body but without a dust cover (so there is nothing to melt at sustained high temperature), uses a twin-metal piston that isolates heat travelling from the disc to the oil seal, and is rated to 1000°C. Available 286–380mm (front). Warranty is 2 years on oil leaks and 10 years on appearance. Built for professional racing and repeated track days.
Caliper colour & finish
Painted colours (Red, Yellow, Gold, Black, Anodized Black) are included at no cost. Want an exact match to your car? Custom Color (+£150) paints the calipers to any Pantone code you supply (15–20 day lead time).
Polished Forged finishes are the flagship: a forged caliper given a mirror-polished surface treatment that shifts colour with the viewing angle. Beyond the looks, the polished surface dissipates heat better, resists rust and stands up to the weather. Choose Titanium (neochrome, +£350), Polished Gold (+£300) or Polished Silver (+£250). They look their best paired with a titanium centre bell. Care: clean only with a dilute neutral cleaner or water.
Candy colours (+£200) use a deep candy-paint and polishing process for a mirror-reflection, boutique finish — pick Teal, Blue, Red or Orange (shown below right).
Centre bells
The centre bell is the CNC-machined aluminium hat that joins the disc to the hub. The standard anodized centre bell is included. The Two-tone bell (+£200) adds an anodized accent ring — choose Red, Yellow, Orange, Purple or Silver right here at checkout. The Titanium centre bell (+£500) is a forged titanium bell (bolts not included) that finishes off the polished-forged look.
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