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Note: Unless stated, all windows are sized to fit into rubber seals. If you need bolt-in sizing, then please contact us.

Regular price $296.00 USD
Regular price Sale price $296.00 USD
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US orders ship in 3 weeks (5 for hard-coated). Delivery in 3–17 business days, depending on location.

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Product information

Every Race Plastics window is custom-made by our experienced team in the UK. Built for motorsport, these polycarbonate windows are lightweight, shatterproof, and far stronger than glass. Unlike acrylics or Perspex, they won’t crack under pressure—giving you peace of mind when you’re pushing hard.

Our standard spec uses 4mm thick polycarbonate, meeting key racing regulations. If you need more strength, we also offer 5mm FIA-compliant windows and hard-coated options for extra durability and scratch resistance.

Windows come in clear, bronze, or grey tints, so you can match the look to your build. You can also add sliders to either or both front doors, depending on how you want to manage airflow.

Window Sliders

Our slider kits are built from the same high-quality polycarbonate as your main windows. Designed for both driver and passenger sides, they’re smooth, secure, and built to last.

You can choose between:

  • Smooth operation with three fixed positions, no rattle
  • Simple and reliable, with two preset stops

Easy to fit and made to avoid rubbing or scratches, these sliders are ideal whether you need more air on track or better control on the road. For full specs, visit the Window Slider Kits page.

How long does shipping take?

We’ll confirm your order right away. Standard polycarbonate kits are usually built and shipped within 3 weeks. Custom or hard-coated orders may take longer—we’ll reach out to confirm the lead time. If you’ve got a race coming up, let us know and we’ll do what we can to hit your timeline.

Can I install the windows myself?

Yes. Most builds are straightforward and there are plenty of how-to videos online. Unless stated otherwise, our windows are made to fit into standard rubber seals. Need bolt-in versions? Just reach out.

Can I pick up my order?

We usually ship via courier, but yes—collection from our Leeds facility can be arranged. Just drop us a message.

Need to change your order?

Get in touch as soon as you can. We’ll do our best to make changes, but if production’s already started, there may be a cost to amend the order.

  • Expertly crafted in the UK

    All of our windows and sliders are hand made to order by our team in the UK.

  • Motorsport compliant

    Our standard windows are made from UK compliant 4mm Polycarbonate.

  • FIA & hard-coated options

    We also offer FIA compliant 5mm & hard-coated options.

  • Road legal warning

    Always check your local vehicle regulations before fitting.

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Not found what you need?

Need a single window, or have a special requirement, no problem. Just let us know what you need.

The Opel Ascona B 2-door rally car

The Opel Ascona B may not be the first car that comes to mind when you think of legendary rally machines, but make no mistake, this unassuming two-door coupe had serious motorsport credentials. Launched in 1975, the Ascona B was the second generation of Opel’s mid-size saloon, designed to take on cars like the Ford Cortina, BMW 3 Series, and Volkswagen Passat. But while it started life as a practical, everyday coupe, its true claim to fame would come on the world rally stage.
Opel built the Ascona B with simplicity, durability, and driver engagement in mind. The design was straightforward, clean lines, a wide stance, and a no-nonsense attitude. Under the bonnet, the standard road-going versions came with a range of four-cylinder engines, ranging from 1.2 to 2.0 litres, offering modest but reliable power. The rear-wheel-drive layout gave it an edge over its front-wheel-drive rivals, making it more engaging to drive, especially in spirited conditions.
The real magic, however, happened when Opel decided to take the Ascona B into rallying. By the late 1970s, Group 4 rallying was heating up, and Opel wanted a piece of the action. Enter the Opel Ascona 400, a homologation special designed specifically to take on the toughest rally stages. This beast packed a 2.4-litre DOHC engine, developed in collaboration with Cosworth, pushing out 144 horsepower in road-going form, but capable of over 240 horsepower in full rally spec.
In the hands of drivers like Walter Röhrl, the Ascona 400 proved it was more than just a competitor, it was a winner. Against all odds, it managed to beat the might of Audi’s four-wheel-drive Quattro, securing the 1982 World Rally Championship in what is often regarded as one of the greatest underdog victories in rally history. This was a rear-wheel-drive car competing against the dawn of all-wheel-drive dominance, and yet, with Röhrl’s legendary skill behind the wheel, it outperformed some of the most technologically advanced machines of its time.
On the road, the Ascona B had a no-frills, driver-focused experience. It wasn’t packed with luxury features, but it had a well-balanced chassis, precise steering, and a lightweight feel that made it a joy to push hard. The rear-drive layout meant it could slide through corners with ease, making it popular among enthusiasts who wanted an affordable coupe with genuine motorsport DNA.
Visually, the Ascona B had a muscular yet understated presence, but the rally-bred Ascona 400 stood out with its wide arches, aggressive stance, and purposeful styling. It looked like it was built for action, and that’s exactly what it delivered.
Today, the Opel Ascona B is a rare but highly respected classic, especially among rally enthusiasts. The standard versions are still appreciated for their simplicity, durability, and classic coupe styling, while the Ascona 400 is a legendary piece of rally history, cherished by collectors and motorsport fans alike.
For those who love raw, rear-wheel-drive performance with a touch of 1970s Opel charm, the Ascona B is an underrated gem that deserves far more recognition than it gets. Whether on a twisty backroad or a dirt-covered rally stage, it remains a true driver’s car, one that proved you didn’t need all-wheel drive to be a champion.

Thought about a slider kit?

Our easy retro fit window slider kits are the essential addition to your racing windows with standard and advanced kits available.

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Need Glue for your New Windows?

  • Why Polycarbonate Windows?

    Learn about what polycarbonate windows are, what benefits they offer and why you should use them.

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  • Perspex or Polycarbonate Windows?

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  • Our Frequently Asked Questions

    Get the answers to key questions on products and services, including deliveries, collections and timescales.

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