
Vauxhall Astra MK4 Polycarbonate Windows
Create your ideal windows below, or contact the team if you have a specific requirement.
Customise your windows:
Note: Unless stated, all windows are sized to fit into rubber seals. If you need bolt-in sizing, then please contact us.
Shipping calculated at checkout.
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.
Key product info:
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Expertly crafted in the UK
All of our windows and sliders are hand made to order by our team in the UK.
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Motorsport compliant
Our standard windows are made from UK compliant 4mm Polycarbonate.
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FIA & hard-coated options
We also offer FIA compliant 5mm & hard-coated options.
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Road legal warning
Always check your local vehicle regulations before fitting.
Not found what you need?
Need a single window, or have a special requirement, no problem. Just let us know what you need.
The Vauxhall Astra MK4 rally car
When the Vauxhall Astra Mk4 arrived in 1998, it had a lot to prove. Its predecessor had gained respect in both touring car racing and rallying, but the Mk4 needed to go even further. Built on an entirely new platform, this Astra was more refined, more aerodynamic, and far better suited to motorsport than ever before. It didn’t take long before the Mk4 became a serious force in the British Touring Car Championship (BTCC) and a popular choice in grassroots rallying.
The Mk4 Astra’s biggest claim to fame came in the British Touring Car Championship (BTCC), where it quickly became one of the most successful and dominant touring cars of its era. Vauxhall, working with Triple Eight Racing, developed the Astra Coupe into a BTCC-winning machine, fielding drivers like James Thompson, Yvan Muller, and Matt Neal.
The Astra Coupe BTCC car featured a heavily modified 2.0-litre, naturally aspirated engine, producing around 280 horsepower, paired with a sequential gearbox and aggressive aerodynamics. The car’s low, wide stance and finely tuned chassis made it a serious competitor against rivals like the Peugeot 406 Coupe, Honda Civic Type R, and Ford Mondeo ST200.
From 2001 to 2004, the Mk4 Astra was almost untouchable in BTCC, securing multiple championships and proving that Vauxhall was the team to beat. The car’s lightweight construction, precision handling, and high-revving power delivery made it the perfect front-wheel-drive race car, able to hold its own against rear-wheel-drive opposition.
The Astra’s success in BTCC wasn’t just about raw speed, it was also about consistency. Vauxhall’s race engineering, clever suspension tuning, and aerodynamics made the Astra a balanced and predictable performer, giving drivers the confidence to push the car to its limits without fear of unpredictable handling.
By the time the Astra was replaced in BTCC by the Vectra in 2004, it had cemented itself as one of the most dominant cars in the championship’s history, setting the foundation for Vauxhall’s continued success in the series.
While the Mk4 Astra’s biggest motorsport success was in touring cars, it also saw action in national and European rallying, where it proved to be a reliable and competitive platform for front-wheel-drive classes. The Astra GSi and SRi models, equipped with 2.0-litre 16-valve ‘Red Top’ engines or later Z20LET turbocharged units, made strong contenders in tarmac rallying, club rallying, and Group N events.
Privateer teams appreciated the Astra for its durability, predictable handling, and strong aftermarket support, making it a cost-effective option for aspiring rally drivers. While it wasn’t built to take on the four-wheel-drive monsters of the WRC, it became a respected competitor in front-wheel-drive categories, often battling against cars like the Peugeot 306 GTi-6, Renault Clio Williams, and Honda Civic Type R.
The Vauxhall Astra Mk4 left a lasting impact on British motorsport, especially in touring car racing, where it proved that a well-built front-wheel-drive car could dominate a national championship for years. Its BTCC titles and consistent podium finishes cemented it as one of Vauxhall’s greatest race cars, while its presence in rallying helped keep the Astra name alive in grassroots motorsport.
Even today, the Mk4 Astra remains a popular choice in track day and rally circles, with many former race and rally cars still being campaigned by privateer teams. The BTCC versions, in particular, are highly sought after, as they represent one of Vauxhall’s most dominant eras in motorsport.
For those who remember the glory days of early 2000s BTCC, the Astra Mk4 stands out as one of the finest front-wheel-drive race cars ever built, a true competitor that proved you don’t need rear-wheel drive to dominate on the track.

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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from 7 reviewsVery helpfull
Nicely finished, very well packed, arrived on time and great value. Thanks!
Windows are easy to fit and look good
Would highly recommend Race plastics. I have used them now on 3 occasions, their products and their customer service are the best I have used, Thank you R.P....
Perfekt fitting, fast delivery.
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