Chester Kieffer

Chester Kieffer (born 23 July 2006) is a Luxembourgish racing driver who competes in Porsche Supercup and Porsche Carrera Cup Germany for Schumacher CLRT.

Career Kieffer began karting at age 15 and made his single-seater debut in the 2023 Ultimate Cup Series Challenge Monoplace season finale at Paul Ricard, where he won all three races in the F4 class. Kieffer then contested round three of the 2024 Formula 4 UAE Championship for X GP at the Dubai Autodrome, where his highest result was fifteenth in race one.

Kieffer's main campaign of 2024 was the French F4 Championship, where he received backing from the Winfield Racing School and enjoyed success in the first half of the season. He got his maiden pole position, podium and win in round two at Lédenon and became the first Luxembourger to win an FIA-sanctioned single seater race. He picked up another podium in race three that weekend, before winning again in the next round at the Circuit de Spa-Francorchamps. After that, Kieffer only mustered three points finishes from the last 12 races – a highest of sixth at the Nürburgring. Despite this, Kieffer managed to hang onto fourth in the drivers' championship with 116 points.

Kieffer also made a cameo in round six of the 2024 F4 British Championship with Xcel Motorsport at Zandvoort, the only international round in the season, and scored four bonus points for overtaking four cars on his way to 19th in race two. In late 2024, Kieffer represented Team Luxembourg in the FIA Motorsport Games Formula 4 Cup at Paul Ricard and finished sixth in the main race.

In 2025, Kieffer switched from Formula 4 to one-make Porsche racing and kicked off his season in the Porsche Sprint Challenge Southern Europe with CLRT Schumacher, where he claimed two pole positions at Portimão, a podium at Estoril, won the rookie title and finished third in the main championship. Kieffer then competed full-time in the Porsche Carrera Cup France for CLRT Schumacher, scoring his only podium in round three at Circuit de Spa-Francorchamps. Kieffer consistently finished in the top 10 throughout the season, beating Enzo Joulié to the rookie title and ending the overall championship in sixth.

In 2026, Kieffer stayed with Schumacher CLRT to compete in Porsche Carrera Cup Germany. After a podium at Zandvoort, Kieffer achieved his first win in the penultimate round at the Nürburgring. Alongside his PCCD commitments, Kieffer made his debut in Porsche Supercup with Schumacher CLRT, where he saw even more success. He secured back-to-back second places at Spa and the Hungaroring, and reached the final round sitting fourth overall, as the highest-placed rookie.

Personal life Kieffer is coached by 2022 Porsche Supercup champion and fellow Luxembourger Dylan Pereira.

Karting record

Karting career summary SeasonSeriesTeamPosition 2023 IAME Euro Series – X30 Senior RSD Karting 185th IAME Warriors Final – X30 Senior NC 2023 WSK Champions Cup – X30 Senior RSD Karting NC IAME Euro Series – X30 Senior 115th Source:

Racing record

Racing career summary Season still in progress.

Complete Formula 4 UAE Championship results (key) (Races in bold indicate pole position; races in italics indicate fastest lap)

Complete French F4 Championship results (key) (Races in bold indicate pole position; races in italics indicate fastest lap)

Complete F4 British Championship results (key) (Races in bold indicate pole position; races in italics indicate fastest lap) Year Team 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 DC Points 2024 Xcel Motorsport DPN1 DPN2 DPN3 BHI1 BHI2 BHI3 SNE1 SNE2 SNE3 THR1 THR2 THR3 SILGP1 SILGP2 SILGP3 ZAN1 ZAN2 ZAN3 KNO1 KNO2 KNO3 DPGP1 DPGP2 DPGP3 DPGP4 SILN1 SILN2 SILN3 BHGP1 BHGP2 BHGP3 BHGP4 30th 4

Complete Porsche Sprint Challenge Southern Europe results (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)

Complete Porsche Carrera Cup France results (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)

Complete Porsche Carrera Cup Germany results (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) Year Team 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DC Points 2026 Schumacher CLRT IMO1 IMO2 RBR1 RBR2SPA1 SPA2 ZAN1 ZAN2 LAU1 LAU2 NOR1 NOR2 NÜR1 NÜR2 HOC1 HOC2 7th* 98* Season still in progress.

Complete Porsche Supercup results (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) Year Team 1 2 3 4 5 6 7 8 Points 2026 Schumacher CLRT MON CAT RBR SPA HUN ZAN1 ZAN2 MNZ 4th* 77* Season still in progress.