The Dallara SF23 TRD 01F is Japan's premier single-seater weapon, introduced for the 2022 Super Formula Championship season. Spark Model's 1:43 replica pins down the No. 20 entry fielded by Team Enex Impul in 2024, with Yuji Kunimoto — the 2016 Super Formula champion — at the wheel. It is one of the few officially licensed 1:43 reproductions of Japanese domestic open-wheel machinery available to international collectors.
The Dallara SF23: Japan's Current-Generation Formula Weapon
Dallara homologated the SF23 for the 2022 Japanese Super Formula Championship as the direct successor to the SF19. The updated package features revised aerodynamics including a modified front wing and reworked bodywork. Power comes from the Toyota/TRD 01F unit — a 2.0-litre turbocharged inline-4 with direct injection producing approximately 550 hp — fitted to all Toyota-aligned entries including Impul's No. 20. The SF23 represents the current technical specification of what is widely regarded as the fastest domestic single-seater series outside Formula 1.
Impul's No. 20 and Yuji Kunimoto's Championship Pedigree
Impul — formally the Ikuzawa Motor Power Laboratory — is among Japan's oldest active racing organisations, founded by Kazuyoshi Hoshino, a driver who competed in the Formula 1 World Championship. The No. 20 is a signature number in Impul's history, carried across multiple championships and chassis generations. Yuji Kunimoto, born in 1993, won the Super Formula title in 2016 with Toyota/TOM'S before joining the Impul operation. The 2024 entry runs under the Enex title sponsorship, reflecting branding from the petroleum and energy sector.
Spark Model's 1:43 Resin Construction
Produced by Spark Model, this 1:43 replica is built to the French marque's standard formula for single-seater subjects: a resin body with decal and photo-etched detail work that reproduces sponsor graphics, wing profiles and cockpit surrounds at the scale. Spark's SFJ-series Super Formula releases represent the most consistently licensed range of 1:43 Japanese open-wheel models in production, with few competing producers covering the same subject matter for the international market.
Context and Collecting Companions
The No. 20 Enex Impul SF23 sits naturally alongside other 2024 Super Formula entries in Spark's range — including Toyota- and Honda-powered SF23 variants — giving collectors the ability to reconstruct a full grid of the current season. Those focused on Impul history will pair it with earlier No. 20 representations, tracing the team's lineage across the SF19 and older chassis. Collectors of Japanese open-wheel racing who follow Kunimoto's career trajectory will find this model an anchor piece for the 2016–2024 arc of his time in Super Formula.
Frequently asked questions
What car does this model represent?
It reproduces the Dallara SF23 TRD 01F, the No. 20 entry fielded by Team Enex Impul in the 2024 Japanese Super Formula Championship, driven by Yuji Kunimoto.
Who is Yuji Kunimoto?
Yuji Kunimoto is a Japanese racing driver born in 1993 who won the Super Formula Championship in 2016 driving for Toyota/TOM'S. He competed for Team Enex Impul during the 2024 season.
What is Team Impul?
Impul (Ikuzawa Motor Power Laboratory) is one of Japan's oldest active racing teams, founded by former racing driver Kazuyoshi Hoshino. The No. 20 is the team's historic race number.
What material is this Spark Model made from?
The model is constructed in resin, in line with Spark Model's standard approach for their 1:43 single-seater replicas.
