
Opel Manta Coupe 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.
Orders are dispatched within 3 weeks, for hard-coated allow 5 weeks.
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Product information
Our polycarbonate windows are hand crafted to order by our experienced UK based team. They are designed to be safe, strong and lightweight, making them ideal for motorsport. They are much stronger than glass and shatterproof, unlike Perspex and other acrylics, so you are well protected whilst driving.
Our standard windows are manufactured from 4mm thick polycarbonate to comply with Motorsport UK regulations, whilst we also offer 5mm FIA compliant and hard-coated options for those looking tougher windows.
All of our windows are available in a choice of clear, bronze or grey polycarbonate so can choose the windows that best suit your car. You also have the option to add window sliders to either one or both of the front door windows depending on your preference.
Window sliders
Upgrade your vehicle with the Race Plastics Window Slider Kit, designed for both driver and navigator sides. Crafted from the same high-quality polycarbonate as your chosen window, these sliders ensure seamless integration and durability. Choose between two locking systems: the Click-Click Bearing Lock for smooth, rattle-free operation with three adjustable positions, or the Split-Pin Lock for a simple, secure, and reliable solution with two preset positions.
Engineered for flawless fitment and effortless installation, our sliders prevent rubbing and scratching, keeping your windows looking sharp. Whether you need maximum airflow on the track or controlled ventilation on the road, this upgrade delivers race-ready performance. For more details, check out our Window Slider Kits.
How long does an order take to ship?
We will confirm receipt of your order straight away and will be in touch if we have any questions regarding your order. Standard polycarbonate orders are usually manufactured and despatched within 3 weeks of the order being placed. Specialist orders - for example if you choose hard-coating plastic - will take longer, but we will contact you and discuss this with you. If you need your order by a certain date then please let us know.
Can I fit the window myself?
Yes, it is straight forward to remove an existing window and install a RacePlastics polycarbonate window. There are plenty of guides on YouTube to help you do this. Unless otherwise stated, all windows are designed to be fitted into rubber seals, please contact us if you require bolt in versions.
Can I collect the order myself?
Yes, we usually courier orders out to our customers, but if you contact us, we can arrange for collection from our Leeds factory.
How can I change my order?
If you need to discuss or change your order in any way, please get in touch with the team at the earliest chance. We will always try to accommodate any changes but costs may be incurred if the manufacturing process has already started.
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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UK road legal warning
All but bronze & grey tinted front door windows are legal on UK roads.
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 Manta Coupe rally car
The Opel Manta Coupe was Opel’s answer to the wave of stylish, fun-to-drive coupes dominating the 1970s and 1980s. Designed to compete with cars like the Ford Capri, Toyota Celica, and even some BMW models, the Manta wasn’t just another sporty coupe, it was a driver’s car with real personality.
First introduced in 1970, the original Manta (A-Series) was a sleek, well-proportioned coupe that immediately stood out with its sharp styling, long bonnet, and wide stance. It was designed with European touring and rallying in mind, blending a balance of sportiness and everyday usability that made it hugely popular. But it was the Manta B, launched in 1975, that truly cemented its place in motoring history.
The Manta B Coupe was a rear-wheel-drive machine with a lightweight, well-balanced chassis, making it an absolute joy to drive. Under the bonnet, Opel offered a range of four-cylinder engines, from 1.2-litre economy units to the more powerful 2.0-litre versions, with power outputs ranging from 55 to 110 horsepower. While that might not sound like much, the Manta made up for it with brilliant handling, a responsive chassis, and a level of agility that made it perfect for spirited driving.
The real fun began when Opel introduced the Manta GT/E, which featured fuel injection, a sportier suspension setup, and a more aggressive look, making it a proper performance model. With tight steering, predictable oversteer, and a lively engine, the GT/E version was a true enthusiast’s car, giving drivers just the right amount of power to play with while keeping the focus on balance and control.
But where the Manta really made its mark was on the rally stage. Competing against the likes of the Ford Escort and Lancia Stratos, the Manta 400 was Opel’s most serious attempt at rallying dominance. Developed with Cosworth, the Manta 400 featured a 2.4-litre twin-cam engine producing over 230 horsepower in competition spec, along with wider arches, lightweight body panels, and a no-nonsense approach to performance. While it didn’t reach the same level of WRC success as some of its rivals, it proved Opel could build a proper, rally-ready sports coupe that could go head-to-head with the best.
Despite its performance credentials, the Manta was also an incredibly stylish car. The sleek coupe design, aggressive stance, and distinctive front-end styling made it stand out from the crowd. It had the kind of timeless appeal that still looks good today, making it a favourite among classic car collectors and enthusiasts who appreciate a well-sorted, rear-wheel-drive sports coupe.
The Manta’s cult status grew in the 1980s, particularly in Germany and the UK, where it became a favourite for tuners, racers, and anyone who wanted a coupe that was fun, affordable, and easy to modify. Even today, well-kept examples are highly sought after, with enthusiasts restoring and modifying them to bring out their full potential.
For those who get behind the wheel of a Manta today, it’s a reminder of a golden era of driving, an era where lightweight, rear-wheel-drive coupes ruled the roads, and every drive felt like a bit of an adventure. It may not have had the badge prestige of some of its competitors, but it had something far more important, character, charm, and a driving experience that puts a smile on your face every time you hit the road.

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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Why Polycarbonate Windows?
Find out whyLearn about what polycarbonate windows are, what benefits they offer and why you should use them.
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Perspex or Polycarbonate Windows?
Find out which oneFind out which you should use for your race windows, why, and which one will protect you the most whilst racing.
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Our Frequently Asked Questions
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