Audi TT Customer Build: Featuring Sparco R100 Vinyl Seats And Harnesses
We love seeing our customers bring their vision to life—and this Audi TT build is a fantastic example of how smart interior upgrades can elevate a car’s entire personality. One of our customers recently completed this stunning project with a pair of Sparco R100 Vinyl Reclining Sports Seats, paired perfectly with Sparco red 4-point road harnesses. From the stitching on the seats to the vibrant harness colour, the combination creates a sleek, motorsport-inspired interior that looks as good as it performs.
But this build goes far beyond just seats. Under the bonnet is a meticulously modified engine bay, while on the outside the car sits aggressively on custom rims. Inside, the addition of a rear roll cage completes the look and gives it a true track-ready feel. It’s a complete package that merges style, performance, and attention to detail—and it all starts with a well-matched Sparco seat and harness setup, supplied right here at GSM Performance.
What We Supplied – Seats, Harnesses & Subframes
This Audi TT’s interior got the full GSM Performance treatment with the following components:
Sparco R100 Vinyl Reclining Sport Seats – Featuring a durable black vinyl trim, these recliners offer comfort, adjustability, and a race-inspired look—perfect for road and occasional track use. They’re not FIA-approved, but are ideal for fast-road cars like this TT.
Sparco Audi TT Direct-Fit Subframes – These vehicle-specific frames make installation seamless. Designed for the Audi TT chassis, they line up with OEM bolt points and match the 345mm bolt pattern on Sparco recliners.
Sparco 4-Point Bolt-In Safety Harnesses (Red, Pair) – The bold red webbing adds a splash of colour while enhancing driver and passenger safety. Designed specifically for recliner seats, these 2-inch wide straps work perfectly with the R100’s harness slots.
Sparco R100 Seat Dimensions – A Perfect Fit for Tight Interiors
One reason the R100 is so popular is its slim-line design, which makes it ideal for smaller cars like the Audi TT, Mazda MX5, or Honda S2000, where space is at a premium. Yet despite its compact profile, it offers excellent comfort and bolstering for spirited driving.
Key Dimensions:
- Total Height: 830mm
- Shoulder Width: 500mm
- Seat Base Width: 500mm
- Depth (front to back): 540mm
- Backrest Height to Shoulders: 700mm
These compact measurements make it easy to install in a wide variety of vehicles while ensuring a sporty, supportive seating position.
Installation – Using Sparco Frames and Runners
Installation in this Audi TT was a smooth process thanks to Sparco’s vehicle-specific subframes, which are designed to bolt directly to the OEM mounting points. The R100 seats share a 345mm bolt pattern with the Sparco TT subframes, allowing a perfect base fit.
To complete the setup, the customer also used Sparco universal sliding runners, which mount between the seat and subframe to allow fore/aft adjustment. This provides full adjustability while maintaining a secure and road-legal installation.
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Sparco Red 4-Point Harnesses – Designed for Recliners
The Sparco 4-point bolt-in red safety harnesses used in this build are the perfect match for the R100 reclining seats. These harnesses feature 2-inch-wide webbing in a classic 4-point configuration, offering enhanced security and support for spirited road driving and non-competitive track days. Their striking red colour also adds a bold visual statement that ties in beautifully with the rest of the car’s sporty interior.
While these belts are not FIA-approved, they are designed specifically for road and track day applications, making them ideal for customers who want the safety and style of a harness without needing full competition certification. The bolt-in ends make them easy to install using existing mounting points, and the shoulder straps are perfectly sized to fit through the harness slots in recliner-style seats like the Sparco R100. With easy adjustability and strong visual appeal, these belts offer the perfect balance of form and function for fast-road and enthusiast builds.
The Sparco R100 Reclining Seat Range
The Sparco R100 is one of the most popular recliners in our store, and it’s easy to see why. We stock a variety of trim options to suit any build or aesthetic:
- Fabric versions – For a classic motorsport look and breathable comfort
- Vinyl versions – For easier cleaning and longer-lasting wear
- Martini Racing Edition – A limited-run seat featuring the iconic Martini Racing livery for those looking to add racing heritage and bold styling to their car
All versions share the same frame, bolstering, and bolt pattern, so it’s just a matter of choosing the material and style that best suits your car and taste.
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From £359.50 Excl. VAT Select options This product has multiple variants. The options may be chosen on the product page
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Roll Cage Options for the Audi TT Mk1 – Safety & Style Combined
For drivers looking to take their Audi TT Mk1 to the next level—whether for track use or show car presentation—a roll cage is the ultimate upgrade. At GSM Performance, we offer roll cages from all the leading brands in the industry, including JP Cages, Custom Cages, SW Motorsport, and Safety Devices, ensuring that no matter your budget or goal, there’s a solution for your build.
Why Install a Roll Cage?
Roll cages are primarily designed for safety in motorsport. They create a rigid, reinforced structure inside the vehicle that significantly increases protection in the event of a rollover or side impact, essential for those participating in track days, time attack, sprint events, or competitive racing. However, beyond the safety benefits, a roll cage also adds a serious visual edge. Whether you’re building a full race car or a show-stopping street car, a well-installed roll cage adds motorsport presence and performance credibility to any interior.
From bolt-in rear cages to full welded multi-point systems, we can guide you through the right choice for your application—ensuring your Audi TT Mk1 looks the part and performs even better. Whether it’s track-ready protection or show-ready styling, our roll cage range has you covered.
To make things even easier, we’ve linked our most popular roll cage options for the Audi TT Mk1 directly on our website. Whether you’re aiming for track-certified safety or a visual statement piece, you’ll find everything you need to upgrade your build on our website.
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From £957.12 Excl. VAT Select options This product has multiple variants. The options may be chosen on the product page
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From £483.33 Excl. VAT Select options This product has multiple variants. The options may be chosen on the product page
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From £879.00 Excl. VAT Select options This product has multiple variants. The options may be chosen on the product page
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Final Thoughts – A Show-Ready Audi TT Interior Upgrade
This Audi TT build is more than just a seat upgrade—it’s a carefully curated project that showcases attention to detail from every angle. The Sparco R100 Vinyl reclining seats and matching red Sparco 4-point harnesses were the finishing touches that brought the interior together, adding both visual impact and functional support. But this TT’s transformation goes far beyond the cabin.
Under the bonnet lies a beautifully modified engine bay, presenting as clean and purposeful as the exterior styling. The car sits low and aggressive on customised wheels, perfectly filling the arches and giving it a bold, track-focused stance. In the rear, a colour-matched roll cage completes the motorsport-inspired theme and ties the interior into the performance aesthetic. With the combination of aesthetic enhancements and carefully chosen Sparco components, this Audi TT is now truly show-ready, built not just to turn heads, but to impress inside and out.
