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

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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.

Regular price $359.00 USD
Regular price Sale price $359.00 USD
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Orders ship in 3 weeks (5 for hard-coated). Delivery in 3–17 business days, depending on location.

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Product information

Race Plastics polycarbonate windows are handcrafted to order by our expert UK team. Designed for motorsport and high-performance use, they’re lightweight, tough, and completely shatterproof—unlike glass or standard acrylics, which can crack under stress.

Our standard windows use 4mm polycarbonate to meet Motorsport UK regulations. We also offer 5mm options that are FIA compliant, plus hard-coated variants for added durability and resistance to scratching.

All windows are available in clear, bronze, or grey tint to suit your vehicle’s design. You can also add window sliders to either or both front doors, depending on your setup.

Window Sliders

Each slider kit is made from the same polycarbonate as your chosen windows. Designed for both driver and passenger sides, these sliders are reliable, practical, and easy to install.

Choose between:

  • Three-position locking with a smooth, rattle-free action
  • Simple two-position setup for fast and secure use

Sliders are engineered to avoid scratching and sit flush with your window kit. Ideal for improving airflow on track days or road builds. More info is available on our Window Slider Kits page.

Shipping times

Once your order’s confirmed, we’ll get started. Most standard orders are manufactured and dispatched within 3 weeks. Custom or hard-coated versions may take a little longer—we’ll contact you with a lead time. If you need your order by a specific date, let us know and we’ll aim to meet it.

Can I fit the windows myself?

Yes, installation is usually straightforward. There are helpful videos online, and our windows are designed to fit into standard rubber seals unless otherwise noted. If you need bolt-in variants, just contact us.

Can I collect my order?

Collection from our UK facility is available by arrangement. Most international orders are shipped, but we’re happy to sort collection if needed—just get in touch.

Want to change your order?

Reach out as early as possible. We’ll always try to accommodate changes, but if manufacturing has already started, there may be a charge.

  • 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.

Not found what you need?

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

The Ford Sierra XR4i rally car

The Ford Sierra XR4i, introduced in the early 1980s, quickly became a standout in the rallying world thanks to its distinctive design and impressive performance capabilities. With its aerodynamic shape and iconic bi-plane rear spoiler, the XR4i was a radical departure from conventional rally car aesthetics of the time. Underneath its sleek exterior, the XR4i housed a robust 2.8-liter V6 engine that delivered a substantial 150 horsepower, providing the necessary grunt for competitive rallying. The rear-wheel-drive configuration, combined with advanced suspension systems, made it a formidable contender on tarmac stages, allowing it to tackle tight corners with agility and power. Its success on the rally stages was a testament to Ford’s commitment to blending style with performance, making the XR4i a beloved model among rally enthusiasts.

The Sierra XR4i's rally career, though somewhat overshadowed by its RS Cosworth sibling, showcased its potential in various national and international events. Privateer teams particularly favored the XR4i for its balance of affordability and performance, making it a common sight in Group A and national rally competitions. The car’s durability and ease of modification allowed teams to extract maximum performance on a variety of terrains, from gravel to snow. Drivers appreciated its predictable handling and the torque-rich V6, which provided a thrilling driving experience. Today, the Ford Sierra XR4i is remembered fondly in the rally community, celebrated not just for its competitive spirit but also for its unique contribution to the evolution of rally car design and engineering.

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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  • Our Frequently Asked Questions

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

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