Big Brake Kit
XYZ Racing Hollow Rear Brake Kit — Bmw 3 SERIES E 90 320 (OE185) (2006-2011)
SKU: XYZ-BRK-BKR-BM-40-A-REAR
- IncludesRear axle pair (2 discs + 2 calipers)
- PositionRear
- Disc Ø330–421 mm
- Caliper pots6 / 8-pot
- Lead time10–15 working days
Fits Bmw 3 SERIES E 90 320 (OE185) (2006-2011)
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Caliper render for this kit:
On a hard-driven E90 320, it is usually the rear axle that quietly sets the limit on how late you can brake. The factory rear discs on the 2006-2011 3 Series carry modest thermal mass, and after a run of heavy stops the pedal lengthens and the back of the car starts to feel vague exactly when you are leaning on it through corner entry.
The XYZ Racing Hollow Rear Brake Kit for the Bmw 3 Series E 90 320 (OE185) is a direct-fit rear big brake upgrade, supplied as a left-and-right pair, aimed at restoring that confidence. It addresses the rear of the car specifically, so the extra clamping capacity arrives where the standard setup runs out first, rather than simply over-braking an already strong front axle.
What this brake kit does for your 2006-2011 Bmw 3 Series E 90 320 (OE185)
The most noticeable change is a firmer, more repeatable pedal once heat is in the system: the rear bite stays consistent through successive stops instead of drifting away. With three pad compound choices, Street, Sport and Racing, you can match the kit to how the car is used, from a daily 320 on the quiet, low-dust Street pad to a circuit-day build that needs the higher-temperature Racing friction, with Sport bridging the two. Better rear thermal headroom also steadies the chassis under trail-braking, where a heat-soaked rear is what tends to make an E90 feel nervous on the way into a turn. The caliper finish is yours to spec, with Red, Yellow, Gold, Black, Anodized Black or a Custom Color available behind the wheel.
About the Hollow Rear Brake Kit
The Hollow name refers to the hollow-vane rotor on the kit’s two-piece floating disc, which trims rotating and unsprung mass at the rear axle while adding the disc area and caliper clamping the standard 320 hardware lacks. It is a bolt-on rear assembly engineered around the OE185 reference and supplied as a pair, with a choice of friction materials. The Street compound suits road use, quiet running and cold bite, Sport steps up heat tolerance for spirited fast-road driving, and the Racing compound is built for the sustained high temperatures of circuit work. Disc faces can be drilled or slotted at the same price, and a Hollow Racing caliper upgrade is available for committed track use. Reducing mass at the corner also lightens the load on the rear suspension, which helps the multi-link rear settle more quickly over kerbs and broken surfaces.
Fitment for the Bmw 3 Series E 90 320 (OE185) (2006-2011)
This kit is specified for the E90-generation 3 Series 320, model years 2006 to 2011, using the OE185 brake reference for this chassis and mounting as a left-and-right pair. It fits the rear axle only. Confirm your exact variant and OE brake code against the listing before ordering so the rotor and caliper match your car.
What buyers also search for
- Bmw 3 Series E90 320 rear brake upgrade for road and track use
- E90 320 big brake kit with Street, Sport and Racing pad compound options
- 2006-2011 Bmw 3 Series rear disc upgrade to cure brake fade on track days
- E90 rear brake caliper colour choices including Red, Yellow and Anodized Black
- Bmw 3 Series E90 320 brake balance fix for trail-braking confidence
Choose your pad compound and caliper colour, then configure yours from the options above.
What’s in the kit
Rear axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 330–421 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 6 / 8-pot
- 2×High-stiffness mounting brackets
- 2×Braided stainless steel brake lines
- 4×High-performance brake pads (1 set)
- 1×Fitting hardware & tools pack
Parking brake: Retains your original (OE) handbrake.
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 330–356mm (rear). 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 3 SERIES E 90 320 (OE185) appear here as the rest of the range publishes.