Taniguchi set a lap record at Tsukuba in 2003 of 55.00 seconds and in 2004 of 54.73 seconds. It produced 560ps (552 hp) out of a tuned and turbocharged 4G63. To compete in additional time attack events domestically and internationally, the HKS Racing Performer CT230R was developed in 2006. This tuned Mitsubishi Lancer Evolution IX set numerous lap records across Japan: 1 minute 42.37 seconds at Fuji Speedway, 1 minute 21.53 seconds at Tokachi Speedway, 1 minute 32.53 seconds at Okayama International Circuit, 1 minute 17.47 seconds at Central Circuit, 1 minute 23.15 seconds at Sportsland Sugo, and 53.99 seconds at Tsukuba Circuit. In the United States, the CT230R set a new record of 1 minute 43.52 seconds at Buttonwillow Raceway. For the World Time Attack Challenge from 2014 to 2016, HKS developed the HKS GT1000+ Nissan GT-R R35. As the name implies, the GT1000+ produces over 1000 ps at 1200 ps (1183 hp). Driven by Taniguchi, the GT1000+ set a class record at Fuji Speedway of 1 minute 39.85 seconds in 2014 and 1 minute 37.77 seconds in 2015. It also won its class at the WTAC at Sydney Motorsport Park with a time of 1 minute 30.83 seconds. Notably, these lap records claim to be the fastest of any Nissan GT-R R35, and are even on par with the Nissan GT-R GT3 race car. HKS returned to the Tsukuba Circuit in 2018 with the HKS TRB-03, a time attack Toyota 86 producing over 811 ps (800 hp). The TRB-03, again driven by Taniguchi, went on to set a new record and broke the 50-second barrier at Tsukuba with a lap time of 49.44 seconds. The TRB-03 also participated in the 2018 World Time Attack Challenge. Later in 2018, HKS began a project to set the record for a front-wheel-drive tuner car at Tsukuba with the HKS TRB-04 Suzuki Swift. The TRB-04 weighed 930 kg (2050 lb) with a stripped body that heavily used carbon fiber, and was powered by a 4G63 MIVEC inline-four engine making 500 ps (492 hp) with an HKS GTIII turbocharger and sequential transmission. Taniguchi set the FF record at the time, with a lap time of 55.498 seconds in January 2019. Japan Super Sports Championship In 1984, HKS supported the FJ20ET engined 'HKS World Trade Silvia S12' competing in the JSS (Japan Super Sports) championship with driver Seiichi Sodeyama. Fuji Grand Champion Series HKS