
XYZ Racing Hollow Front Brake Kit — Toyota SIENNA IV (XL40) (2020-2026)
SKU: XYZ-BRK-BKF-TO-044-FRONT
- IncludesFront axle pair (2 discs + 2 calipers)
- PositionFront
- Disc Ø330–444 mm
- Caliper pots6 / 8 / 12-pot
- Lead time10–15 working days
Fits Toyota SIENNA IV (XL40) (2020-2026)
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Caliper render for this kit:

The fourth-generation Sienna (XL40) is a heavy hybrid MPV, comfortably over two tonnes before you load eight people and their luggage, and its standard front brakes spend their entire life fighting that mass. On a long motorway descent, a fully laden run to the airport, or repeated stops in town, the factory front discs soak up heat faster than they can shed it, and the pedal goes long. The XYZ Racing Hollow Front Brake Kit for the Toyota Sienna IV (XL40) is aimed squarely at that problem: more thermal capacity at the busiest axle, so the front end keeps its bite when the standard setup would already be fading.
It is a front-axle upgrade, a matched pair of front calipers and discs, not a styling kit. The hybrid drivetrain blends regenerative braking with the friction brakes, but it is still the friction hardware that does the hard work under heavy load, and that is exactly where this kit puts the extra material.
What this big brake kit does for your 2020-2026 Toyota Sienna IV (XL40)
The first thing you notice in a two-tonne-plus Sienna is a firmer, more consistent pedal when the brakes are hot. The larger front rotor carries more thermal mass, so heat builds more slowly and dissipates faster, which keeps fade at bay on the kind of sustained braking a loaded MPV actually does. The vented two-piece floating disc vents heat and clears pad gas and dust, helping the pads keep a clean, predictable contact patch. Choose the pad compound to suit the duty: Street for quiet, low-dust everyday family use, Sport for a firmer bite with more heat tolerance, or Racing if the Sienna doubles as a tow vehicle or sees hard, repeated stops. The result is shorter, more repeatable braking when the van is full and working hard.
About the Hollow Front Brake Kit
The Hollow Front Brake Kit is built around an enlarged front rotor with a vented friction face designed to shed heat and evacuate gas and brake dust rather than trap it, and a hollow-body caliper as standard. Paired with the bigger two-piece floating disc is an uprated front caliper that clamps a larger pad, spreading load and heat over more surface area than the original equipment hardware. Discs are available drilled or slotted at the same price. The kit ships with a choice of three pad compounds, Street, Sport and Racing, so the same caliper and rotor can be tuned from quiet daily commuting through to heavy, repeated braking. Painted calipers are included at no cost in Red, Yellow, Gold, Black or Anodized Black; a Custom Color in any Pantone is £150, premium polished-forged Titanium, Polished Gold and Polished Silver are offered, and candy Teal, Blue, Red and Orange complete the choices. Centre bells upgrade to two-tone anodizing in five colours or titanium, and a Hollow Racing caliper rated to 1000C is there for the hardest use. Everything is sized for the front axle of the XL40 Sienna, the axle that carries the most weight and does the most braking work in this front-biased hybrid platform.
Fitment for the Toyota Sienna IV (XL40) (2020-2026)
This kit is a front-axle fitment for the Toyota Sienna IV, XL40 chassis, across the 2020 to 2026 model years, supplied as a left-and-right pair. It fits the front position only; confirm your wheel clearance against the chosen caliper before ordering, as big brake kits on MPVs can be sensitive to wheel internal diameter and spoke design.
What buyers also search for
- Toyota Sienna XL40 front big brake kit for towing and full-load braking
- Toyota Sienna IV hybrid brake upgrade to reduce fade on long descents
- Sienna XL40 front brake kit with Sport or Racing pad compound options
- Toyota Sienna big brake kit with coloured calipers: Red, Yellow, Gold, Black, Anodized Black or Custom
Specify your pad compound, disc style and caliper colour, then order your Sienna IV (XL40) front big brake kit from the options above.
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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