The Porsche Carrera GT has never needed much help in the theatre department, but the Miller Motorcars JC9 takes its rawest ingredients in a more bespoke direction.
Set for a global reveal during Miller Motorcars’ 50th Anniversary celebration, the JC9 is a one-off coachbuilt supercar shaped around the Carrera GT’s naturally aspirated V10 and manual gearbox.
It’s a rare kind of modern commission, less about adding power for headlines and more about rebodying one of the great analogue supercars with a distinct visual language.
At a glance
- Miller Motorcars will reveal the JC9 as a one-off coachbuilt supercar during its 50th Anniversary celebration.
- The car retains the Porsche Carrera GT’s naturally aspirated V10 engine and manual gearbox, with a new carbon-fibre body.
- Designed by Jason Castriota, the JC9 takes visual inspiration from endurance racing cars of the 1960s through the 1980s.
A Carrera GT Recast in Carbon Fibre
The JC9 keeps the core appeal of the Carrera GT intact, which means a naturally aspirated V10 paired with a manual transmission.
That decision matters because the Carrera GT’s character has always rested on mechanical intensity rather than electronic polish.
Instead of softening that personality, Miller Motorcars has commissioned a car that appears to preserve the driver-focused centre while giving the exterior a complete rethink.
The entire body is constructed from carbon fibre, a material choice that helps manage weight while giving the project freedom from the Carrera GT’s factory surfacing.
For collectors, that combination is the point.
The JC9 isn’t trying to turn the Carrera GT into something unrecognisable underneath, but it does give one of Porsche’s most distinctive supercars a fresh coachbuilt identity.
Jason Castriota’s Ninth Automotive Project
The JC9 name refers to Jason Castriota’s ninth automotive project, making the car as much a personal design marker as a client commission.
Castriota’s résumé includes work connected to the Ferrari P4/5, Maserati GranTurismo and SSC Tuatara, which gives useful context for the JC9’s blend of drama and restraint.
Miller Motorcars and Castriota have co-developed the car over several years, positioning it far away from a quick cosmetic conversion.
That slower development timeline is important for a coachbuilt car, where proportion, stance and surface discipline often decide whether the finished result feels coherent or merely expensive.
Endurance Racing Cues Without Nostalgia Overload
Visually, the JC9 draws from endurance race cars of the 1960s through the 1980s.
That era gives the project a rich design vocabulary, from long-distance competition shapes to cleaner aerodynamic forms that predate the more aggressive visual language of many modern hypercars.
The result is described as clean, purposeful and slightly retro, which sounds like a measured brief rather than a costume exercise.
That restraint may be the JC9’s strongest design argument.
A coachbuilt Carrera GT could easily have tipped into excess, but the stated approach suggests a car intended to feel athletic and timeless rather than decorative.
Details & Specifications
| Brand | Miller Motorcars |
|---|---|
| Model | JC9 |
| Donor car | Porsche Carrera GT |
| Engine | Naturally aspirated V10 |
| Transmission | Manual gearbox |
| Body | Carbon fibre |
| Designer | Jason Castriota |
| Production | One-off commission |
| Reveal | Miller Motorcars 50th Anniversary celebration |
The JC9 should appeal most to collectors who see the Carrera GT as a high point of analogue supercar engineering, but still value the individuality of traditional coachbuilding.
With its V10, manual gearbox, carbon-fibre body and endurance-racing influence, it has the ingredients to become one of the more closely watched one-off supercars of the year.
