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Big Brake Kit

XYZ Racing Hollow Front Brake Kit — Subaru IMPREZA STI GDB (E/ F) (2005-2007)

SKU: XYZ-BRK-BKF-SU-005-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 GDB (E/ F) (2005-2007)

Brake pad compound

Street: quiet, low-dust, strong cold bite for road driving. Sport: higher temperature range and more bite for fast road and occasional track. Racing: maximum fade resistance for sustained track use (noisier and dustier cold). Match the pad to how hard you actually brake.

Disc size

Caliper grade

Hollow is the standard caliper: a lighter hollow-body forged caliper with a dust cover and a 5-year warranty. Hollow Racing drops the dust cover for sustained high-temperature use (rated to 1000°C, 2-year warranty) — the track-grade choice.

Caliper colour

Painted colours are included. Polished-forged finishes are mirror-polished forged calipers (Titanium, Gold, Silver); candy colours are a deep, mirror-reflection paint. Both are premium upgrades — fuller detail further down the page.

Painted — includedTell us the exact Pantone (PMS) code you want the calipers painted.Polished forgedCandy
Disc style

Drilled discs (cross-drilled holes) vent gas and water and look aggressive; slotted discs (surface grooves) wipe the pad face clean and resist fade under sustained hard use. Same price — choose on looks or how you drive.

Centre bell

The centre bell is the CNC-machined aluminium hat that joins the disc to the hub. Standard anodized is included; a two-tone bell adds an anodized accent ring in your choice of colour; titanium is the lightest, forged option.

Carbon-ceramic rotor

Carbon-ceramic rotors are a special-order track upgrade: far lighter than steel, fade-resistant at extreme temperatures and extremely long-lived. The price follows the disc size you choose above. The standard two-piece steel rotor is included.

Configured price£1,800.00Inc. VAT

Lead time: 10–15 working days from payment


£1,800.00

Made to order. Full payment is taken at checkout. Production begins once payment is confirmed.

Pay by card, Apple Pay, Google Pay — or Klarna on eligible orders.

Caliper render for this kit:

XYZ Racing Hollow Front Brake Kit — Subaru IMPREZA STI GDB (E/ F) (2005-2007) — 304 mm
304 mm

The GDB Impreza STI came to market with four-pot front calipers as standard on UK-spec cars, an impressive starting point but one calibrated for road use rather than the sustained demands of circuit work. The GDB-E and GDB-F variants carry the symmetrical AWD system and EJ207 turbocharged flat-four in a chassis that generates genuine corner-entry speed; on a flowing circuit like Cadwell or Snetterton, the stock setup reaches its thermal limit well before the rest of the car does.

Covering the Subaru Impreza STI GDB (E/F) build years 2005 to 2007, the XYZ Racing Hollow Front Brake Kit is a single-axle upgrade, 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 when you order, a single kit covers everything from spirited fast-road use to serious track preparation.

What this brake kit does for your 2005-2007 Subaru Impreza STI GDB (E/ F)

The hollow-vane disc addresses heat build-up directly, drawing cooling air through the rotor body to lower operating temperatures under repeated hard stops. On a GDB STI where trail braking is the primary tool for corner rotation, the DCCD system rewarding drivers who load the front axle during turn-in, pedal consistency through a session matters as much as raw stopping force. The two-piece floating discs pair an aluminium centre bell with an iron friction ring, holding the disc true through repeated heat cycles and trimming rotating mass at the front axle, a measurable benefit on a car this sensitive to front-end dynamics. Braided stainless lines are included for a firmer pedal than rubber hoses that swell under load.

Three pad compounds let owners match friction material to actual usage. 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 rated for sessions where Street or Sport pads would begin to fade.

About the Big Brake Kit

Built around the hollow-vane disc, the kit manages the thermal demands of performance driving by drawing cooling air through the rotor body, shedding heat into the airstream rather than soaking it into solid iron. The two-piece floating discs reduce rotating mass compared to a solid equivalent, lowering unsprung weight at the front axle. The calipers are hollow-body as standard for stiffness without excess weight, supplied as a left-and-right pair.

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 GDB (E/ F) (2005-2007)

This front big brake kit is specified for the Subaru Impreza STI on the GDB platform, E and F variants, covering 2005 to 2007 model years, and fits the front axle as a left-and-right pair. These suffix letters mark the final development phase of the WRX STI in the GDB generation. Verify your build year and variant code before ordering, as earlier GDB suffix letters (A through D) carry different front hub and caliper mounting geometry that this kit is not designed for.

What buyers also search for

  • Subaru Impreza STI GDB front brake upgrade for road and track use
  • GDB STI big brake kit with compound options for circuit driving
  • Subaru Impreza STI 2005-2007 front brake kit to address heat fade under track conditions
  • XYZ Racing hollow brake kit for Impreza STI with caliper finish selection
  • GDB STI brake upgrade beyond the factory specification for sustained circuit sessions

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.

Hollow Racing caliper

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).

Polished forged caliper finishes
Candy caliper colours

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.

Two-tone anodized centre bells
Same car

Other products that fit this vehicle

Front & rear brake kits, coilovers and more for this car

  • More XYZ products for the Subaru IMPREZA STI GDB (E/ F) appear here as the rest of the range publishes.