
XYZ Racing Hollow Rear Brake Kit — Opel OMEGA B (1994-2003)
SKU: XYZ-BRK-BKR-OP-004-REAR
- IncludesRear axle pair (2 discs + 2 calipers)
- PositionRear
- Disc Ø380–421 mm
- Caliper pots8-pot
- Lead time10–15 working days
Fits Opel OMEGA B (1994-2003)
Added to basket ✓
Caliper render for this kit:

The Omega B carries serious mass at the back. As a large rear-wheel-drive executive saloon – and a heavier estate again – it leans on its rear axle hard under braking, and the factory rear setup was specified for a comfortable motorway cruiser, not a car being driven on its door handles. The XYZ Racing Hollow Rear Brake Kit for the Opel Omega B (1994-2003) swaps that softer rear arrangement for a larger disc and caliper built to take repeated heat without going soft.
For the drift builds, fast-road V6 cars and MV6 owners keeping these saloons alive in 2026, the rear brakes are what settle the car on turn-in and hold the tail under trail-braking. As a rear kit it is a matched pair of left and right calipers and two uprated discs. It sharpens that without locking you into one pad: Street, Sport and Racing compounds are all on the table.
What this brake kit does for your 1994-2003 Opel Omega B
Fit it and the first thing you notice on a heavy Omega is a firmer, more progressive pedal, with the rear axle no longer dragging the car’s balance about when you brake late into a roundabout or a slip road. The bigger rear disc adds thermal mass, so a run of hard stops down a B-road – or a session leaning on the car – doesn’t cook the back into a long, vague pedal. Pad choice is yours: Street for a daily Omega, Sport for a quicker fast-road V6, Racing compound once the car sees track or drift use and the rear is doing real work. Stronger rear braking also lets you set the car’s balance under load on your terms rather than fighting an overwhelmed back axle, and with the included colour range the upgrade reads through the wheels.
About the Hollow Rear Brake Kit
XYZ Racing builds the Hollow Rear Brake Kit as a complete rear-axle upgrade rather than a pad-and-fluid patch. You get an uprated two-piece floating disc and caliper sized to add braking capacity at the back of a car that, in Omega form, has plenty of weight to haul down, with braided lines firming the pedal and a hollow-vane rotor shedding heat across repeated stops. The kit ships with three pad compounds – Street for quiet road use, a Sport compound that copes with harder fast-road driving, and a Racing compound for track and drift work – so you spec the kit around how the car is actually used. Calipers are hollow-bodied as standard, with an optional Hollow Racing build (no dust cover, rated 1000C, two-year warranty) for sustained heavy use. Painted finishes are included at no extra cost in Red, Yellow, Gold, Black and Anodized Black; a Custom Color in any Pantone is +£150, with premium polished-forged Titanium, Polished Gold and Polished Silver and candy Teal, Blue, Red and Orange finishes available. Discs are drilled or slotted at the same price, and two-tone anodized or titanium centre bells can be specified at checkout. Because it is a bolt-on big brake kit for a defined chassis, the fitment is worked out for the Omega B rather than adapted from a universal bracket.
Fitment for the Opel Omega B (1994-2003)
This kit is specified for the rear axle of the Opel Omega B across the full 1994-2003 production run, covering the saloon and estate bodies on that platform. Confirm your car sits inside the 1994 to 2003 window, then choose your pad compound and caliper colour when you order.
What buyers also search for
- Opel Omega B rear big brake kit for fast-road and track use
- Omega B rear brake upgrade for drift and V6 MV6 builds
- Vauxhall Omega rear caliper and disc kit with Sport or Racing pads
- Opel Omega B heavy estate rear braking upgrade for repeated stops
- Omega B rear big brake conversion with a full caliper colour range
Set your Opel Omega B rear brake kit up the way the car earns its keep – pick your pad compound and caliper colour from the options above and build yours.
What’s in the kit
Rear axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 380–421 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 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.

Other products that fit this vehicle
Front & rear brake kits, coilovers and more for this car
