The SEMA Show never disappoints when it comes to amazing unveils and reveals, and 2026 is no different. Why not start it off with a bang with this Porsche GT4 RS Clubsport car built by Kellymoss?
The Kellymoss Porsche GT4R
The racing team with more Porsche podiums than any team in history debuts its ultimate track-day creation in partnership with Hoonigan
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Kellymoss, the winningest team in Porsche racing history, revealed the Kellymoss GT4R at the SEMA Show 2025, setting a new benchmark for race car innovation and craftsmanship. Built upon the acclaimed Porsche GT4 RS Clubsport platform, the GT4R embodies Kellymoss’s relentless pursuit of performance and precision, engineered by racers, for the driven or uncompromising.
“When Porsche built the GT4 RS Clubsport, they created one of the most driver friendly track cars ever made,” said Victoria Thomas, co-owner of Kellymoss . “But we asked ourselves, what if we could take it further? The GT4R is the answer. Lighter, sharper and more connected to the driver than ever before.”
The Kellymoss GT4R merges Porsche engineering excellence with the ingenuity that has defined Kellymoss’s racing dominance for more than three decades. Every component was considered to achieve more grip, more feedback andmore connection between driver and machine. From the titanium exhaust that delivers a raw Cup car soundtrack to the multilink rear suspension that transforms handling, every modification serves a singular goal: performance without compromise.
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Key modifications include:
- Titanium exhaust system with high-flow catalytic converters and muffler delete, reducing weight by approximately 35 pounds and enhancing throttle response.
- Full aerodynamic redesign, including a new front splitter, rear diffuser and a massive rear wing for significant downforce and stability at high speeds.
- Carbon fiber body kit encompassing hood, bumpers, fenders, rockers and diffuser to reduce mass, increase rigidity and offer customizable finish options.
- Wider track with custom fenders and quarter panels, allowing for 12-inch front and 13-inch rear wheels for increased cornering grip.
- Optional Kellymoss rear suspension kit, an in-house installation that elevates handling precision beyond Cup-car levels, replacing factory strut design with upper and lower control arms, correcting bump steer and camber curves for massive improvement in mechanical grip.
Building A Champion
The GT4R is both a showcase of Kellymoss’s engineering philosophy and a tribute to Porsche’s motorsport legacy, balancing innovation with restraint. Each enhancement was measured for maximum value and harmony with the original chassis, a disciplined “less is more” approach honed through years of championship-winning experience. Displayed within the Hoonigan exhibit at SEMA, the GT4R represents a collaboration between two icons of performance culture. The build rides on custom Rotiform wheels, part of Hoonigan’s premium aftermarket lineup.
“SEMA is the ultimate stage for innovation,” said Thomas. “It’s where the best builders in the world show what’s possible, and we’re proud to stand among them with a car that redefines what a Porsche track machine can be.”
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For more information, visit www.kellymoss.com.
About Kellymoss:
Kellymoss is the most winning team in Porsche racing history, with a legacy built on championships, innovation and precision. Based in Madison, Wisconsin, and led by co-owners Andy Kilcoyne and Victoria Thomas, the team oversees more than 100 active Porsche projects, blending elite motorsports with white-glove service and craftsmanship. Beyond the track, Kellymoss is deeply rooted in community and access, opening its doors to the public, hosting youth programs , and leading diversity-forward initiatives to grow the sport for future generations. From championship cars to custom builds, every Porsche that enters Kellymoss gets the same relentless attention to detail and pursuit of perfection.
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