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Big Brake Kit

XYZ Racing Hollow Rear Brake Kit — Bmw 3 SERIES E 30 323 (1982-1991)

SKU: XYZ-BRK-BKR-BM-01-I-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 30 323 (1982-1991)

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 30 323 (1982-1991) — 330 mm
330 mm

The E30 323i was the chassis that taught a generation what a balanced rear-drive saloon should feel like, and its semi-trailing arm rear axle still rewards a driver who can read it. What it never had was a rear brake to match the speed the M20 straight-six lets you carry. The XYZ Racing Hollow Rear Brake Kit for the Bmw 3 Series E 30 323 closes exactly that gap.

This is a rear-axle upgrade for owners pushing a car well past 30 years old harder than Munich ever planned for: fast road, the occasional track day, and spirited B-road work where the standard rear discs run out of thermal headroom. Supplied as a left-and-right pair for the rear hubs, it lets you pick a pad compound and caliper finish and gets on with the job.

What this big brake kit does for your 1982-1991 Bmw 3 Series E 30 323

On a car as light as the E30, the rear brakes do more of the work than owners expect, and they are the first thing to wilt when you start trail-braking into a corner. This kit gives the rear axle consistent bite so the back of the car stays predictable under load, rather than stepping out when a hot disc snatches. The three pad compound options, Street, Sport and Racing, let you match the rear to how you actually drive, from a daily commute to repeat track sessions. The two-piece floating disc and its hollow-vane rotor trim unsprung mass at each rear corner, which the semi-trailing arm suspension feels as sharper response over mid-corner bumps. Finish the look behind the wheels with a caliper colour: Red, Yellow, Gold, Black or Anodized Black.

About the Hollow rear brake kit

The Hollow rear brake kit is XYZ Racing’s answer to the weight-versus-stopping-power problem on classic rear-drive BMWs. It centres on a two-piece floating disc with a hollow-vane rotor that sheds rotational and unsprung mass without giving up the swept area you need to manage heat. It ships with a choice of three pad compounds: a Street compound for quiet, low-dust road use, a Sport compound that bites harder once warm for fast road and the odd track lap, and a Racing compound built to survive repeated high-temperature stops without the fade that ruins a session. Caliper finishes start with Red, Yellow, Gold, Black and Anodized Black at no extra cost, then extend to a Custom Color in any Pantone, polished-forged Titanium, Polished Gold and Polished Silver, and candy Teal, Blue, Red and Orange. The hardware is sized as a direct rear-axle fitment for the E30 323, so it works with the existing hub geometry instead of forcing a wholesale rear-end redesign.

Fitment for the Bmw 3 Series E 30 323 (1982-1991)

This kit is mapped to the E30-generation 3 Series 323 across the full 1982 to 1991 production run, mounting at the rear axle as a pair. It is a rear-position kit, so it pairs naturally with a matching front setup if you are upgrading the whole car. Confirm your chassis code reads E30 and your model year falls inside that span before you order.

What buyers also search for

  • Bmw 3 Series E30 323 rear brake upgrade for fast road and occasional track use
  • E30 323 big brake kit with Street, Sport or Racing pad compound options
  • Classic BMW rear brake conversion that cuts unsprung weight at the axle
  • E30 323 caliper colour choices: Red, Yellow, Gold, Black or Anodized Black
  • Rear-axle braking upgrade for the 1982-1991 3 Series, not just a front-only fix

Set your pad compound and caliper colour using the options above to build your E30 323 rear brake kit.

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

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