Two awesome Porsche 935 race cars highlight this week’s eclectic selection of race cars for sale in the Motorsport Prospects Marketplace in partnership with Racing Edge. In addition to the two Porsches, I am featuring a rare Panoz DP09B, a gorgeous Heron GT MK IV, an enclosed cockpit Radical RXC V8 2.9L and a stunning 2017 McLaren 570 GT4. Which one will you pick to hit the track with?
1981 Porsche 935 K4
This 1981 Porsche 935 K4, one of only two chassis built by Kremer Racing, represents the pinnacle of 935 development. This highly modified race car, featuring an 800+ horsepower 3.2-liter flat-six engine and a 4-speed manual transmission, was driven by legendary racers such as John Fitzpatrick, Bob Wollek, and Derek Bell. With a full tubular chassis and only the roof and windshield supplied by Porsche, the K4 was a radical evolution of the factory 935. It achieved eight 1st place finishes and 13 podiums, including two wins in Europe with Wollek and five IMSA victories under Fitzpatrick’s ownership. The car’s success is a testament to Kremer Racing’s engineering prowess and continuous development of the 935 concept.
After its competitive career, the K4 passed through several owners, including actor Nicolas Cage. Most recently, the car underwent an extensive restoration to its 1983 IMSA specifications, retaining its original mechanical brilliance and aggressive aerodynamic design. Revered as one of the most powerful 935s ever built, this car embodies the end of the GT racing era, with accolades from drivers like Fitzpatrick, who called it the fastest 935 ever. Now meticulously maintained and restored, this K4 is a rare opportunity for collectors and racing enthusiasts alike.
More details and photos of the car and how you can contact the seller direct can be found here.
1979 Porsche 935 Joest
This 1979 Porsche 935 Joest, the first of the Joest-built Porsche 935s, is a significant piece of racing history, boasting two 1st place finishes and 15 podiums. Driven by legends like Reinhold Joest and Rolf Stommelen, this chassis (009 0001) remained untouched and in its original condition since its racing days, never damaged or modified. The car features a 3.2-liter twin-turbocharged flat-six engine, recently rebuilt with only three hours of use. Known for Joest Racing’s enhancements, such as a tubular space frame for improved suspension and factory-specific aerodynamics, the car represents Joest’s pioneering contributions to the 935 platform.
After its retirement from racing in 1981, the car was owned by Swiss collector Albert Obrist and later by former F1-czar Bernie Ecclestone. In 2006, Canepa acquired it for race preparation and maintenance, ensuring its pristine condition. The car underwent further inspections and a top-end engine rebuild in 2018, maintaining its remarkable originality and race-readiness. With its strong racing pedigree and impeccable condition, the 935 Joest is a prime example of a historic Group 5 racer, perfect for vintage racing events or as part of an elite private collection.
More details and photos of the car and how you can contact the seller direct can be found here.
Panoz DP09B
This Panoz DP09B, designed for the Superleague Formula series (2008-2011), is a highly sought-after modern formula race car that was driven by notable drivers such as Sébastien Bourdais and Antonio Pizzonia. Featuring a carbon fiber monocoque and bodywork, Koni dampers, Brembo brakes with carbon discs, OZ Racing rims, and a Hewland 6-speed sequential gearbox with pneumatic paddle shift, the car weighs just 750 kg. Its powerful 4.2-liter V12 engine produces 750 horsepower and 510 Nm of torque, making it a formidable machine. Limited availability of the chassis offers a unique opportunity for collectors and racers to acquire and rebuild this iconic car with new or overhauled components, including a fresh engine, revised gearbox, and crack-tested suspension parts.
With extensive experience running these cars over 15,000 km since 2015, the team behind this sale guarantees their speed, reliability, and ease of maintenance. They hold a stock of original parts worth €2.5 million, ensuring long-term availability of replacement components. Eligible for prestigious racing series such as European Boss GP and Maxx Formula, and welcomed at numerous demo events, the Panoz DP09B offers a rare chance to own and race a modern V12-powered formula car. Full maintenance and on-track support services are available for the new owner, making it an ideal investment for both racers and enthusiasts.
More details and photos of the car and how you can contact the seller direct can be found here.
Heron GT MK IV
The Heron MK4 GT Sports Racing Car, designed and built in 1967 by Ross Baker, Bob Gee, and Chris Cooke, is a replica of the Ford GT40 MK4, inspired by its success at Le Mans. Baker and Gee meticulously researched the GT40’s design and specifications, choosing to power the car with a 327 ci Chevrolet Corvette engine. However, the gearbox posed a challenge, so they designed and built their own unit using a combination of Ford Zephyr gears and other custom components. They also constructed a steel monocoque chassis with fiberglass body panels and fabricated the suspension from steel with coils. The project was two-thirds complete when the sports car racing body changed the engine capacity limit to 2000cc, rendering the Heron MK4 obsolete before it ever raced.
Despite this setback, the car was completed in 1988 and raced at the Whenuapai Wings and Wheels event, where it performed well but was held back by its outdated 1967 brakes. After changing hands and spending time in New Zealand, the United States, and Belgium, it was eventually purchased by its current owner, who prepared it for European racing with the help of Adrias Stals in Latvia. The car received upgraded brakes, new coil-overs, and an increase in engine horsepower, while still using the original Heron-designed transaxle. The Heron MK4 has since competed successfully in several races, including at Le Mans in 2018, performing strongly in a mixed field.
More details and photos of the car and how you can contact the seller direct can be found here.
Radical RXC V8 2.9L
This Radical RXC V8 2.9L Race North American Edition is a high-performance race car equipped with a 2.9-liter RPE V8 engine producing 440 bhp at 9,100 rpm and 280 lb-ft of torque at 7,500 rpm. It features a bespoke Quaife 7-speed transverse sequential gearbox with paddle shift and auto-blip, designed for seamless gear changes. The chassis consists of a high-tensile CDS carbon tubular steel spaceframe with FIA-spec crash boxes, and the car is outfitted with endurance racing upgrades such as a 26.4-gallon FIA fuel cell, dry-break refueling system, and an air jack system. Aerodynamically, the RXC boasts composite diffusers, a high-downforce carbon bi-plane rear wing, gullwing doors, and a full lighting system with LED daytime running lights.
The suspension includes front and rear double wishbone, pushrod setups with bespoke inboard triple-adjustable Intrax dampers. Inside, the left-hand drive cockpit features a multi-function steering wheel, electronic power-assisted steering, and FIA-compliant Corbeau seats with six-point harnesses. Electronics include an AIM race logger and SmartyCam system, along with brake pressure logging and rear-facing cameras. The braking system is made up of six-pot calipers and fully-floating discs, and the car runs on graphite-finished center-lock racing wheels with racing slicks. The package also includes spare parts and boxed new body panels, making it ideal for high-end track performance and endurance racing.
More details and photos of the car and how you can contact the seller direct can be found here.
2017 McLaren 570 GT4
This 2017 McLaren 570 GT4 is a well-maintained, single-owner vehicle with limited track day mileage, making it an ideal choice for racing enthusiasts. With only 2833 km (1760 miles) on the odometer, it remains in excellent condition, needing only minor repairs such as a cracked windshield and a new left rear inner fender liner. It also comes with a passenger seat and VBox installed. The car is eligible for an upgrade to the 2025 McLaren Trophy specifications under the SRO banner, allowing it to compete in the upcoming championship alongside the McLaren Artura Trophy EVO and the 570 Trophy models.
Powered by a 3.8L twin-turbo V8 engine and a 7-speed SSG transmission, this McLaren 570 GT4 features a lightweight carbon fiber MonoCell II chassis with aluminum frames, unique aerodynamics, and high-performance racing components. It includes FIA-approved safety features such as a roll cage, six-point harness, fuel cell, and fire extinguisher. The car is equipped with motorsport dampers, center-lock magnesium wheels, and a 110-liter fuel capacity. This track-ready machine is a rare opportunity to own a race-prepped McLaren, perfect for both competitive racing or making a statement at any track day event.
More details and photos of the car and how you can contact the seller direct can be found here.
Author: Mark Boudreau
Mark is the publisher of Motorsport Prospects. As a former lawyer, he applies his legal background and research skills to assist race drivers by showcasing the resources they need to make their motorsport careers happen.
