Big Brake Kit
XYZ Racing Hollow Front Brake Kit — Bmw Z4 E85 M-COUPE/ ROADSTER (2006-2008)
SKU: XYZ-BRK-BKF-BM-070-FRONT
- IncludesFront axle pair (2 discs + 2 calipers)
- PositionFront
- Disc Ø356–444 mm
- Caliper pots6 / 8 / 12-pot
- Lead time10–15 working days
Fits Bmw Z4 E85 M-COUPE/ ROADSTER (2006-2008)
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Caliper render for this kit:
The Z4 M’s short wheelbase concentrates weight transfer quickly under hard braking. Get the front axle wrong on a car with the S54’s output and the consequences are immediate. XYZ Racing’s front big brake kit addresses the front-end demands of a chassis built for hard driving but with no tolerance for under-specced components.
Three pad compound options let you configure the kit to the car’s actual use across a matched pair of front calipers and discs. The Racing compound needs proper operating temperature to deliver, and a committed Z4 M circuit session generates it reliably. The full caliper finish range, from the no-cost painted colours through to premium and candy options, completes the conversion without forcing a compromise on appearance.
What this brake kit does for your 2006-2008 Bmw Z4 E85 M-COUPE/ ROADSTER
The S54 pulls cleanly to 8,000rpm, making it easy to arrive at braking zones carrying more speed than intended. Two-piece floating front discs cut rotating and unsprung mass and manage heat more effectively than a solid one-piece disc under hard, repeated stops, which matters when the Z4 M’s short wheelbase puts the front axle under rapid, concentrated load transfer. The floating mount also lets the disc expand and contract with temperature without distorting, so the pedal stays consistent over a session. Braided stainless lines keep that pedal firm as the fluid heats. The three pad compounds match the kit to usage: Street for road duties across variable conditions with quiet, low-dust running; Sport for spirited driving with occasional track exposure; Racing for circuit sessions where fade resistance under sustained thermal load is the requirement.
About the Hollow Front Brake Kit
XYZ Racing’s design uses a vented two-piece floating rotor to draw heat away from the pad contact face during extended braking, keeping friction levels consistent where a solid disc would begin to saturate. The kit is a front-axle pair, the Z4 M’s primary braking contribution, and includes three distinct pad compound options: Street for the broadest road operating range, Sport to raise the performance threshold for regular hard driving, and Racing for track conditions where pad operating temperature stays elevated. The calipers are hollow-body as standard for low corner weight, with the Hollow Racing caliper available as an upgrade for serious track use, no dust cover, rated to 1000C and carrying a two-year warranty. Disc faces are drilled or slotted at the same price. Painted colours, Red, Yellow, Gold, Black and Anodized Black, ship at no extra cost; Custom Color matches any Pantone for a set fee, and premium polished-forged finishes (Titanium, Polished Gold, Polished Silver) and candy finishes (Candy Teal, Candy Blue, Candy Red, Candy Orange) are available. Two-tone centre bells in five anodized colours, or titanium, are selectable at checkout.
Fitment for the Bmw Z4 E85 M-COUPE/ ROADSTER (2006-2008)
This kit fits the BMW Z4 M-Roadster (E85) and M-Coupe (E86) across the full 2006 to 2008 production run. Both body styles share the same front suspension architecture, and the kit fits either variant directly. The year span covers the complete M-specification production run; confirm your chassis designation, E85 Roadster or E86 Coupe, before selecting if ordering through a trade account.
What buyers also search for
- BMW Z4 M-Coupe front brake upgrade for track day and fast-road use
- E85 Z4 M big brake kit with pad compound options for circuit work
- BMW Z4 E85 M-Roadster two-piece floating disc conversion 2006 2007 2008
- Z4 M front brake kit compatible with S54-engined E85 and E86 variants
A lightweight, short-wheelbase sports car with the S54’s willingness to rev deserves a front braking setup to match. Configure your compound, disc style and caliper colour when you order above.
What’s in the kit
Front axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 356–444 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 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 Bmw Z4 E85 M-COUPE/ ROADSTER appear here as the rest of the range publishes.