Create your ideal windows below, or contact the team if you have a specific requirement.

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Customise your windows:
£215.00 GBP
£215.00 GBP
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Total price (no additional VAT) Shipping calculated at checkout.

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:

  • 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.

  • 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.

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The BMW E21 3 Series Coupe rally car

The BMW E21 3 Series Coupe isn’t just another classic, this was the car that kick-started one of the most iconic performance lineages in automotive history. Born in 1975 as the first-generation 3 Series, the E21 was designed to blend everyday usability with a proper driver’s experience. But let’s be honest, what made it truly shine was its motorsport potential.
While the E21 wasn’t officially built for rally or touring car racing straight from the factory, that didn’t stop enthusiasts from turning it into a proper competition machine. With its rear-wheel-drive setup, lightweight chassis, and a selection of punchy inline-four and inline-six engines, it became a go-to choice for privateer racers and tuners looking to push the limits. BMW itself got in on the action with the 320 Group 5, a fire-breathing, wide-body turbocharged monster that tore through the European Touring Car Championship in the late ‘70s. It was loud, it was aggressive, and it made sure everyone knew BMW was serious about racing.
None of that front-wheel-drive nonsense here. The E21 gave drivers the pure, connected feel that made BMW famous. The 323i, with its 2.3L inline-six, had the kind of sound and pull that made you want to keep shifting just to hear it sing. It wasn’t the fastest thing in a straight line, but it handled like a dream and begged to be thrown into corners. More importantly, it was a modder’s paradise. Strip it down, tweak the suspension, slap on some fat fenders, and you had a serious competitor on the rally stage or the track. And then there was the Group 5 320 Turbo, an absolute animal with 600+ horsepower, a gigantic wing, and a presence that screamed ‘get out of my way.’
Although its successors, like the E30 M3, often steal the spotlight, the E21 laid the foundation for BMW’s motorsport dominance. It was a workhorse in touring car championships and a hidden gem in the rally world, where its nimble handling and strong power-to-weight ratio made it a fun underdog against AWD competitors. Today, it remains a favourite among historic racing enthusiasts who want to relive the golden days of analogue driving.
If you ever see an E21 tearing through a rally stage or carving up a circuit, you know you’re looking at a piece of BMW history, an old-school coupe that still knows how to have a good time.

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 some advice?

  • Why Polycarbonate Windows?

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

    Find out why 

  • Perspex or Polycarbonate Windows?

    Find out which you should use for your race windows, why, and which one will protect you the most whilst racing.

    Find out which one 

  • Our Frequently Asked Questions

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

    Find out more 

Need help with BMW E21 3 Series Coupe windows?

We love helping our customers find what they need - we are dedicated to making sure you enjoy your passion to the most. 

Contact our team