The 2004 Mosler MT900R Comes to Project Motor Racing

21. March 2025

The 2004 Mosler MT900R was a track-focused weapon that combined a lightweight body with a 5.7L GM-sourced LS1 V8 engine. Renowned for its aerodynamic design and exceptional handling, it has become a rare, sought-after icon of American performance and engineering ingenuity.

Engine: Chevy 5.7L V8 (restricted)

Power: 450 bhp @ 5700 RPM

Torque: 425nm @ 5,000 RPM

Weight: 1100 kg

Transmission: 6-speed manual

Layout: Mid-engined, rear-wheel drive

A Track-Focused Weapon

Founded by hedge fund exec Warren Mosler in 1985 in Riviera Beach, Florida, Mosler Automotive carved out a niche for itself by producing lightweight, high-performance machines that prioritized function over form. The 2004 Mosler MT900R stands as a shimmering example of this philosophy, one that combined innovative engineering with a no-nonsense approach to sports car racing. The result? Winner of the GTS Division at the 2003 running of the 24 Hours at Daytona and winner of the British GT Championship (with three straight one-two finishes in its first three races before rounding off the year with four more victories). That’s how you leave an indelible mark on the world of motorsport.

Aerodynamic Primacy

The MT900R was the evolution of the MT900, a road-legal supercar that debuted in 2001. Designed by British engineer Rod Trenne (who’d go on to work with Panoz), the MT900R retained the original car’s striking silhouette but was stripped down and optimized for the track. Mosler would end up selling more race variants (50) than the actual road car (35).

The car’s aerodynamic profile was shaped in a wind tunnel, and that resulted in an all-business low-slung stance, a massive rear diffuser, and an adjustable rear wing that generated significant downforce. Every curve and vent served a purpose, and the design proved polarizing at the time.

But there was no denying its effectiveness.

American Muscle Meets Precision Engineering

Under the hood, the MT900R was powered by a variety of big muscle engines in various classes, such as a Chevy 7.0L V8 engine. For Project Motor Racing, the MT900R is powered by the self-same engine it used for the 2004 GT racing season–—a Chevy LS6 V8 pushing around 450bhp (restricted), putting it firmly in line with N-GT class rivals.

Mated to a six-speed manual transmission, the Mosler provides one of the most visceral drives in Project Motor Racing, raw as it is exhilarating.

The Chevy V8 was chosen not just for its grunt but also for its reliability and tunability. The result was a powertrain that was both brutally powerful and remarkably durable.

Oh, it sounded the business too!

Track Domination

With a curb weight of just over a ton in Project Motor Racing (in British GT, it came it at around 890kgs), the car boasted a power-to-weight ratio that rivalled the best in sportscar racing. Zero to 100kmh came in a blistering 3.1 seconds and top speed was over 200mph. But it wasn’t just straight-line speed that made the MT900R special—it was its handling.

The MT900R was a driver’s car in the purest sense, demanding skill, precision, and a light touch, but it rewards those who can drive it as intended with unparalleled performance.

Racing Pedigree

The MT900R quickly made a name for itself in racing series on both sides of the pond, including the FIA GT Championship and the American Le Mans Series. But despite its impressive performance, the MT900R remained a rare sight. Each car was built to order, with buyers able to specify customizations to suit their preferences. This exclusivity only added to the MT900R’s mystique.

The 2004 Mosler MT900R proved that a small, independent manufacturer could take on the giants of the automotive world. With its lightweight construction, monstrous V8 engine, and race-ready handling, the MT900R is a testament to the power of innovation and determination.

When you experience it, you’ll be reminded of a time when motorsport was more about pushing boundaries and defying expectations than anything else. Pure racing passion.

Discuss this news item in our forum.