Big Brake Kit
XYZ Racing Hollow Front Brake Kit — Smart SMART (FOR TWO) W451 (2007-2014)
SKU: XYZ-BRK-BKF-SM-002-FRONT
- IncludesFront axle pair (2 discs + 2 calipers)
- PositionFront
- Disc Ø286–444 mm
- Caliper pots4 / 6 / 8 / 12-pot
- Lead time10–15 working days
Fits Smart SMART (FOR TWO) W451 (2007-2014)
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Caliper render for this kit:
The W451 ForTwo’s rear-engine layout puts most of its kerb weight over the rear axle at standstill, an unusual distribution that shifts sharply forward under heavy braking and loads those compact OEM front discs with demands their city-car brief never anticipated. In normal urban use the standard setup is adequate. String together a sequence of committed stops at a sprint event or autocross and the gap becomes obvious: the front calipers lose consistency before a conventional front-engined car’s would, because thermal management was never a design priority.
The XYZ Racing front brake kit for the Smart ForTwo W451 (2007-2014) addresses that directly. A pair of larger front discs and multi-piston calipers, fitted left and right, expands the swept area and pushes fade onset out, while two-piece floating discs let each rotor expand independently of its alloy bell so the disc stays flatter as temperatures climb.
What this brake kit does for your 2007-2014 Smart SMART (FOR TWO) W451
The hollow-vane disc design draws cooling air through the rotor body during rotation, improving thermal recovery over the solid OEM front discs. That is the kind of difference that accumulates across a day of short, repeated runs rather than in a single isolated stop, exactly the duty a W451 sees at a sprint or autocross when weight pitches forward time after time.
Three pad compounds tune the kit to how you drive. Street is the quiet, low-dust road default. Sport adds bite and a wider heat range for fast road and the occasional track day. Racing is a full track compound for cars driven hard and consistently. The discs can be drilled or slotted at no extra cost.
About the Hollow Front Brake Kit
Every XYZ caliper is a hollow-body forging as standard, which strips weight from the corner without giving up stiffness, a meaningful saving on a car this light. For owners who spend serious time on circuit, the optional Hollow Racing caliper drops the dust cover, is rated to 1000C, and carries a two-year warranty.
Calipers come painted in Red, Yellow, Gold, Black, or Anodized Black at no extra cost, clearly visible through the W451’s wheel apertures on a car whose proportions already draw attention. Custom Color matches any Pantone shade for £150. Premium polished-forged finishes are offered in Titanium, Polished Gold, and Polished Silver, alongside candy finishes in Teal, Blue, Red, and Orange. Centre bells can be upgraded to a two-tone anodized finish in five colours or to titanium, and braided lines firm up the pedal further. All of it is selectable above when you order.
Fitment for the Smart SMART (FOR TWO) W451 (2007-2014)
This front brake kit is specified for the Smart ForTwo W451, covering the full 2007-2014 production span at the front axle as a matched pair of left and right calipers and discs. Both the initial and facelift W451 variants fall within this window. Confirm your exact build year before ordering.
What buyers also search for
- Smart ForTwo W451 front brake upgrade for sprint events and autocross
- Smart ForTwo W451 front brake kit with Street, Sport and Racing pad compound options
- W451 ForTwo performance front braking with painted, custom and polished caliper finishes
- Smart ForTwo big brake kit fitment 2007 to 2014
Pad compound, disc style, and caliper colour are all chosen when you order, using the options shown above.
What’s in the kit
Front axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 286–444 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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More XYZ products for the Smart SMART (FOR TWO) W451 appear here as the rest of the range publishes.