[1][2] The company first ventured into motorsport in the FIA GT Championship entering a Reiter-manufactured Diablo GTR for the 2000 season.

2007 saw Reiter's greatest success as the team opened the year with their first victory, drivers Christophe Bouchut and Stefan Mücke winning in Zhuhai.

Their driver Albert von Thurn und Taxis won the Lamborghini Manufacturers' Cup as well.

Following Reiter's success in FIA GT3, the team chose to move their Gallardos to the new ADAC GT Masters series in Germany for the inaugural 2007 season.

From 2000 to 2014, Reiter Engineering had developed a relationship with Lamborghini as their technical partner for their GT1, GT2, and GT3 series of race cars.

Reiter would enter the Blancpain GT Series with these cars alongside Grasser Racing Team and NSC Motorsports.

Team owner Hans Reiter founded subsidiary Sareni United (stylized as SaReNi-United) in 2012.

Sareni United was responsible for the company's GT3 race cars based on the fifth generation Chevrolet Camaro.

Each team ran a number of programs in each race weekend they participated in, including setup with the Reiter engineers and courses with partners of the programme.

The best male and female drivers of the programme were given a seat in the Blancpain GT Series Sprint Cup for the following year.

They also entered the 2017 Blancpain GT Series Endurance Cup, racing alongside Tomáš Enge.

Lennart Marioneck, Patric Niederhauser, and Mads Siljehaug were the final graduates of the programme, taking part in the 2018 Blancpain GT Series Endurance Cup with Reiter the following year.

Reiter Engineering has been responsible for developing and helping create several GT racing cars, primarily for Lamborghini and KTM since the company's foundation in 2000.

[12] The company was a partner for Lamborghini for 14 years from 2000 to 2014, constructing race cars based on the Murciélago and the Gallardo.

The company has also created a GT racing car based on the Chevrolet Camaro under their subsidiary Sareni United.

Reiter Engineering's Diablo GTR was an attempt to bring Lamborghini's motorsports presence to the international stage, by adapting the car to comply with FIA GT Championship regulations.

The R-GTs have been modified from their production versions, most notably by removing the four-wheel drive system to comply with FIA, ACO, and JAF regulations.

R-GTs were used by customer teams such as DAMS in the FIA GT Championship, and Krohn-Barbour Racing in the American Le Mans Series.

Derivatives of the R-GT were built for the Japanese Lamborghini Owners Club to compete in the Super GT championship and 2006 24 Hours of Le Mans, called the RG-1 and the RG-1LM.

The LP560 GT3 received a power increase, improved suspension geometry, updated aerodynamics, and a reduction in vehicle weight, resulting in a more efficient race car.

In 2012, Reiter Engineering's subsidiary Sareni United were in charge of a GT3 specification race car project based on the fifth generation Chevrolet Camaro.

[23][24] One of those teams, Dale Paterson Motorsports, returned with the Camaro for 2018 and continued to use the chassis until the car was finally retired at the end of 2021.

[33] It also featured new front and rear lights, new camshafts for an improvement on low-end torque, Mahle pistons for better reliability and efficiency, and a retuned exhaust for a more aggressive sound.

[34] It debuted in the 2015 Blancpain GT Sprint Series and won the qualifying race of the fourth round with the company's works team at Moscow Raceway.

The carbon fibre and epoxy resin body has undergone a significant change and the car's wheelbase has been extended by 17 cm to accommodate the rules and regulations of GT4 racing.

[41] The update was focused on increasing the car's straight-line speed capabilities while maintaining the cornering performance of the previous X-Bow GT4.

[42][43] A more powerful SRO GT2 specification race car of the GTX was released the same year, called the X-Bow GT2 Concept.

The package featured extensive modifications to the car, including carbon fibre bodywork, aerodynamic upgrades, and black OZ alloy wheels.