Big Brake Kit
XYZ Racing Hollow Front Brake Kit — Bmw 5 SERIES E 39 525 (1995-2003)
SKU: XYZ-BRK-BKF-BM-014-FRONT
- IncludesFront axle pair (2 discs + 2 calipers)
- PositionFront
- Disc Ø330–444 mm
- Caliper pots6 / 8 / 12-pot
- Lead time10–15 working days
Fits Bmw 5 SERIES E 39 525 (1995-2003)
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Caliper render for this kit:
The E39 5 Series carries a longitudinally mounted straight-six ahead of the front axle, and the 525 arrived from the factory with brakes sized for a comfortable executive saloon rather than one being pushed on an extended B-road run or a lightly used track morning. Fade under sustained load is a well-documented frustration for owners who’ve found the limits of the 2.5-litre unit.
This XYZ Racing Hollow Front Brake Kit replaces the front assembly with a stepped-up specification: a single-axle front kit, a left and right pair of calipers on two-piece floating discs. Three pad compound grades and a full caliper colour range, from functional to openly visible through open-spoke wheels, make it a configurable upgrade rather than a fixed swap, with every choice set at the configurator above.
What this brake kit does for your 1995-2003 Bmw 5 SERIES E 39 525
The E39’s front axle handles the majority of the stopping load. The car’s weight distribution, longitudinal engine and front-heavy bias, means the front brakes are doing disproportionate work from the moment you trail-brake into a corner, and the 525’s standard caliper specification was never as generous as the items fitted to M Sport-packed 530 and 540 variants. The two-piece floating disc improves heat dissipation at the source, addressing the thermal build-up that softens pedal feel after repeated hard stops, while cutting unsprung and rotating mass and letting the friction ring expand without coning. Three pad compounds let you match the installation to actual use: Street for a refreshed, quiet, low-dust OE feel, Sport for spirited road work with more bite and heat range, Racing for sustained circuit sessions where the front axle temperature rises and stays there. Caliper finishes, from the included no-cost painted colours through to the premium polished and candy ranges, cover everything from a discreet refurbishment to a deliberate contrast through the spokes.
About the Hollow Front Brake Kit
The XYZ Racing Hollow Front Brake Kit is built around a hollow-bodied caliper as standard and a two-piece floating disc, a design that targets the core thermal weakness on heavier European saloons under repeated hard braking: the ability to shed heat between applications. Factory disc specifications on E39-era cars were set to a road-comfort brief, and this kit widens that performance envelope considerably. Three compound grades, Street, Sport, and Racing, are available at the point of build, so the same kit fits a daily that occasionally sees a trackday without requiring a separate pad order, and the optional Hollow Racing caliper, with the dust cover removed, rated to 1000C and covered by a two-year warranty, steps the system up for hard circuit use. Discs come drilled or slotted at the same price, centre bells upgrade to two-tone anodized in five colours or to titanium at checkout, and the caliper is offered in the included Red, Yellow, Gold, Black, and Anodized Black, a Custom Color in any Pantone, premium polished Titanium, Polished Gold, and Polished Silver, and candy Teal, Blue, Red, and Orange, giving the installation a considered visual result alongside the performance change. The kit covers the front axle only.
Fitment for the Bmw 5 SERIES E 39 525 (1995-2003)
This kit is specified for the E39-generation BMW 5 Series 525, covering the full production run from 1995 to 2003, a span that includes both the M52-engined 525i and the later M54B25-powered variant introduced in the 2000 facelift. The front-axle fitment addresses the heavier end of the braking load on the E39 platform. If your car carries the M Sport brake pack, confirm your existing caliper and rotor dimensions before ordering, as factory brake specifications varied within the E39 range.
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Set your pad compound, caliper colour, and disc style above to build the kit for your E39 525.
What’s in the kit
Front axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 330–444 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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