
Ginetta G4 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 Ginetta G4 rally car
Some cars win races with brute force. Others, like the Ginetta G4, do it with brains, balance, and a whole lot of bravery. This wasn’t some big, fire-breathing V8 muscle car, nor was it an exotic Italian masterpiece. It was a tiny, lightweight, fibreglass sports car built by a small British company that didn’t care about prestige, they just wanted to make something fast, fun, and unbeatable on the track.
Launched in 1961, the G4 was Ginetta’s answer to the wave of nimble, lightweight sports cars that were making names for themselves in club racing. The philosophy was simple: keep it as light as possible, give it just enough power, and make sure it corners like a housefly on espresso. The result? A car that weighed around 500kg, which is less than half of what modern hot hatches weigh today. Power came from small-capacity Ford engines, ranging from a 1.0-litre up to a 1.5-litre, which doesn’t sound like much, but in a car this light, it was plenty. This thing didn’t need brute strength to win races, it just needed the right driver and a bit of open road.
On track, the G4 was an absolute menace, punching well above its weight. It was the kind of car that made owners of Jaguars and Aston Martins furious, because here was this tiny, affordable British special overtaking them in the corners like it had something to prove. The combination of independent suspension, a stiff tubular chassis, and a perfect front-to-rear weight balance made it feel alive, a car that talked to you through the steering wheel, begged to be pushed harder, and never felt like it was trying to kill you (unless you got too cocky).
Despite its size, the G4 had a proper sense of theatre. The fibreglass bodywork kept it feather-light, but also gave it a unique look, long bonnet, low stance, and that unmistakable "I'm here to cause trouble" attitude. It was available as both a road-going sports car and a full competition machine, making it the perfect toy for anyone who wanted a proper driver’s car without selling a kidney to afford it.
And then came the G4R, the full-fat race version. If the standard G4 was quick, this thing was an absolute missile. It had wider tracks, flared arches, a hotter engine, and an even more aggressive stance, making it an absolute terror in GT racing. It wasn’t just keeping up with bigger, more expensive cars, it was beating them.
Even today, the Ginetta G4 is a legend among classic racing enthusiasts. It’s still tearing up historic racing events, still holding its own against cars with twice the power, and still proving that lightness beats brute force every single time. The best part? It still offers that pure, unfiltered, mechanical driving feel that modern cars have all but forgotten.
If you ever get the chance to drive one, do it. It’s not about straight-line speed. It’s not about fancy electronics. It’s about raw, analog driving fun, the kind that makes you grin like an idiot every time you throw it into a corner and come out the other side feeling like a hero. It may not have been the most famous sports car of its time, but for those who knew what it could do, the G4 was nothing short of a racing masterpiece.

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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Windscreen Bonding Adhesive - Primerless & Drive within 1 hour

Let customers speak for us
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.
Thank You.
Want some Window Advice?
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Why Polycarbonate Windows?
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Perspex or Polycarbonate Windows?
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Our Frequently Asked Questions
Find out moreGet the answers to key questions on products and services, including deliveries, collections and timescales.
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