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Big Brake Kit

XYZ Racing Hollow Rear Brake Kit — Bmw 3 SERIES E 90 325 (OE185) (2006-2011)

SKU: XYZ-BRK-BKR-BM-42-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 90 325 (OE185) (2006-2011)

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£2,200.00Inc. VAT

Lead time: 10–15 working days from payment


£2,200.00

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 Rear Brake Kit — Bmw 3 SERIES E 90 325 (OE185) (2006-2011) — 330 mm
330 mm

The E90 325i puts real demand on its rear axle: rear-wheel drive, a kerb weight north of 1,500kg, and a chassis that likes to be trail-braked into a corner. The factory rear discs handle the commute, but lean on them across a track session and they heat-soak. The XYZ Racing Hollow Rear Brake Kit for the BMW 3 Series E90 325 (OE185) is built to take that load, using a two-piece floating disc that pulls rotating and unsprung mass off the back of the car.

This is the OE185 rear-specific fitment, supplied as a left-and-right pair and sized to sit behind the factory wheel and balance against the front brakes on a 325i running the N52 six. Choose it to sharpen rear bite for fast-road use, or to keep a weekend track car consistent when the front end is already sorted.

What this brake kit does for your 2006-2011 BMW 3 Series E90 325

The most immediate change is at the pedal: less fade as the discs hold temperature through repeat stops, so the rear axle keeps doing its share late in a session. The hollow-vane rotor trims rotating and unsprung weight, which the E90’s multilink rear suspension rewards with quicker recovery over kerbs and broken surfaces. Three pad compounds, Street, Sport and Racing, let you match bite and dust to how the car is actually used, from quiet, low-dust daily duty to circuit days. And with calipers in Red, Yellow, Gold, Black, Anodized Black or a Custom Color, the upgrade reads through the spokes without shouting.

About the Hollow rear brake kit

The Hollow rear brake kit takes its name from the hollow-vane rotor on its two-piece floating disc, which cuts mass at the rear axle rather than carrying the weight of a heavier solid casting. Less rotating weight means the brakes spin up and shed heat more readily; less unsprung weight means the suspension fights less inertia over a rough surface. This is a rear-axle package, discs, calipers and pads supplied as a set for the left and right hubs, so braking balance is engineered together rather than bolted on piecemeal. Pad choice spans three compounds: a Street pad for quiet, low-dust road manners, a Sport pad for harder fast-road driving, and a Racing compound built for sustained track temperatures. Disc faces can be drilled or slotted at the same price, caliper finishes run from the included colours through a Custom Color in any Pantone to premium polished-forged and candy options, and a Hollow Racing caliper upgrade is available for committed track use, so the hardware can match or contrast the car’s scheme.

Fitment for the BMW 3 Series E90 325 (2006-2011)

This kit is the rear fitment for the BMW 3 Series E90 325, covering the 2006 to 2011 model years under the OE185 reference and mounting as a left-and-right pair. It is a rear-axle kit only, built around the E90 saloon’s factory rear hub and disc geometry. Confirm your chassis code and build year against the OE185 listing before ordering, so the disc and caliper mounting match your car.

What buyers also search for

  • BMW 3 Series E90 325 rear brake upgrade for fast road and track use
  • E90 325 hollow disc rear brake kit that resists fade across repeat stops
  • BMW E90 rear big brake kit with Street, Sport and Racing pad options
  • E90 325 caliper colour choices: Red, Yellow, Gold, Black or Anodized Black
  • Rear-axle brake kit to balance an already-upgraded E90 325 front end

Set your pad compound and caliper colour for the 2006-2011 BMW 3 Series E90 325 rear brake kit, and configure yours using 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.

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 Bmw 3 SERIES E 90 325 (OE185) appear here as the rest of the range publishes.