If you build BMWs to be driven hard on track, the name ST Trackparts has probably crossed your radar — quietly at first, then everywhere. Brake cooling kits that actually replicate factory race-car ducting. Splitters designed for downforce, not just looks. Weight-saving door pulls that have become a genuine best-seller. So who are ST Trackparts, and why are they changing the game for BMW track cars? Here's the full picture — and how to get their parts UK-stocked, without the EU wait, at R44 Performance.
ST Trackparts at a glance
- Who: A Netherlands-based manufacturer of high-performance parts for BMW track & race cars.
- Focus: Brake cooling, aerodynamics, ducting, reinforcements and weight-saving track hardware.
- Range: Around 200+ parts covering nine BMW generations — E30 through G8X — plus MINI.
- Ethos: "Made by people who track their own cars." Every part is validated at real track days before it ships.
- Reputation: A Trustpilot rating of roughly 4.3★, with quality and fast shipping the standout themes.
- Buy in the UK: Stocked domestically by R44 Performance — no EU shipping delays or import duty.
Who are ST Trackparts?
ST Trackparts is an enthusiast-led BMW specialist that designs, tests and builds its parts in-house in the Netherlands. Where a lot of the aftermarket is a generic tuning catalogue, ST Trackparts is the opposite: a focused motorsport-parts maker whose whole identity is built around genuine track use. Its central promise — "made by people who track their own cars" — isn't marketing fluff. Parts are trialled on the company's own BMWs at track days before they're released, so designs are proven in the real world rather than only in CAD.
The catalogue is organised so you can shop the way you think: either by your specific car ("shop by car") or by the type of part you need ("shop by part"). It's a small, sharp range built by people who clearly understand what breaks, overheats and flexes when a BMW M car is pushed on circuit.
First things first: ST Trackparts is not ST Suspension
This one trips people up constantly, so let's clear it up. ST Trackparts is not the same company as ST Suspension. ST Suspension is the coilover and spring sub-brand owned by KW Automotive. ST Trackparts is a completely separate, unrelated manufacturer that does not make suspension or coilovers at all. Its world is brake cooling, aerodynamics, ducting, reinforcements and interior/exterior track hardware. If you've been searching for one and finding the other, that's why.
"Engineered for fitment": the philosophy that sets them apart
ST Trackparts positions itself under two banners — "Driven by Motorsport" and "Engineered for fitment" — and its value proposition rests on four pillars, each aimed squarely at a track-day owner's real concerns:
- Real-world tested. Every part runs on the company's own cars at track days before it ships to yours. Credibility earned on circuit, not on a spec sheet.
- Chassis-specific. Kits are modelled to each individual platform for clean, snug, precise fitment — not universal parts forced to fit. Where trimming is required, kits ship with cutting templates.
- Guided install. Step-by-step guides mean you can realistically fit most parts in your own garage in an afternoon.
- Real support. Pre-sale technical and fitment help from people who actually know the cars, so you can confirm fitment before you buy.
Add it together and you get a brand aimed at owners who value correct fitment, cooling performance and the ability to do the work themselves — the priorities that matter most when a car sees regular track time.
The product range: what ST Trackparts actually makes
The catalogue runs to roughly 200+ parts. Here's how it breaks down — and where to find each area in the ST Trackparts collection:
Brake cooling — the heart of the range
Brake cooling is where ST Trackparts made its name. The range spans complete front kits (using the fog-light or bumper housings), high-airflow control-arm duct kits, and OEM-style funnel kits — all designed to reduce brake fade and extend pad and disc life on track. The flagship is the M4 GT4 Brake Cooling Kit for the F80 M3 and F82 M4, which replicates the OEM BMW M4 GT4 race-car ducting and ships complete with bumper ducts, cutting templates, aluminium backing plates and all the hoses, clamps and hardware.
Cooling plates & ducting
Aluminium brake cooling plates channel air directly onto the disc and pair neatly with the duct kits. Alongside them sits a full ducting system — OEM-style brake ducts, control-arm ducts, intake funnels, flexible air-duct hose (51 mm and 63 mm) and quick-release connectors — so you can build or extend a complete cooling path exactly how you want it.
Aero: splitters, canards & vents
Aero is the largest category. Think front splitters (including the flagship E36 High Downforce Splitter Kit), canards and dive planes in standard and carbon fibre, underbody flaps, fender and hood vents, and reflector-delete rear vent kits — parts that add real downforce, stability and cooling airflow rather than just visual aggression.
Aerodiscs, door pulls, short shifters & reinforcements
Aerodiscs smooth airflow around popular track wheels (fitments for Motec, Japan Racing, Konig, APEX, BBS and more). Lightweight door-pull strap conversions — including the best-selling M2 G87 kit and a popular E36 version — replace the OEM interior handle to save weight and add a race-style pull. Round it out with short-throw shifter kits for sharper gear changes, plus chassis reinforcements and tow straps for cars built to be driven hard.
BMW chassis coverage: E30 to G8X, plus MINI
Few specialists reach as far across the BMW range. ST Trackparts covers nine generations: E30, E36, E46, E8X (1 Series / 1M), E9X (incl. E9x M3), F2X (incl. M2 F87), F8X (F80 M3, F82/F83 M4, F87 M2) and G8X (G80/G82/G83 M3/M4, G87 M2), plus selected MINI hardware. Coverage is deepest on the modern F8X and G8X M cars, but the classics aren't forgotten — the E36 and E46 in particular are well supported for cooling, aero and interior weight-saving. You can browse everything in one place in the ST Trackparts collection.
Materials & manufacturing
The engineering is motorsport-grade. You'll find fibre-reinforced plastic (FRP) ducts with a UV-resistant finish for exterior cooling parts, aluminium backing and cooling plates finished in satin-black powder coat, carbon-fibre options on selected aero and door-pull products, and CNC-machined aluminium components produced to tight tolerances. It's all in service of that "engineered for fitment" promise: parts modelled to each specific chassis so they bolt on cleanly, trialled on real cars before release, and supplied with templates and guides where installation calls for them.
Why buy ST Trackparts from R44 Performance in the UK
Because ST Trackparts ships from the EU, ordering direct can mean import duties, customs handling and a longer wait for UK buyers. That's where we come in: R44 Performance stocks ST Trackparts domestically in the UK, so you get tracked UK delivery with no EU shipping delays or import charges — plus expert BMW fitment advice before you buy, and our own returns and support team if you need us afterwards.
If you're building a track-focused BMW and want it to stay cool, planted and light, this is a range worth knowing. Browse the full ST Trackparts collection at R44 Performance →
ST Trackparts FAQs
Is ST Trackparts the same as ST Suspension?
No. They are separate, unrelated companies. ST Suspension makes coilovers and springs (owned by KW Automotive); ST Trackparts makes BMW brake cooling, aero and reinforcement parts, and does not produce suspension.
Which BMWs does ST Trackparts fit?
Nine generations plus MINI: E30, E36, E46, E8X, E9X, F2X, F8X and G8X. Coverage is deepest on the modern F8X and G8X M cars.
What is the M4 GT4 Brake Cooling Kit?
It's ST Trackparts' flagship brake-cooling kit for the F80 M3 and F82 M4, replicating the OEM BMW M4 GT4 race-car ducting. It ships complete with bumper ducts, cutting templates, aluminium backing plates and all hoses, clamps and hardware.
Can I install ST Trackparts myself?
Yes. Kits are designed for DIY fitting in an afternoon and ship with step-by-step guides. Some cooling and aero kits need minor trimming, in which case cutting templates are supplied.
Do I pay EU import duty if I'm in the UK?
Not when you buy through R44 Performance. We stock ST Trackparts domestically in the UK, so you get tracked UK delivery with no EU shipping delays or import charges.
