Hello Ben.
No there is no tricks to the HKS CT230R except great attention to detail. It's been left how it ran on the track. There has been intercooler and radiator differences between tracks but otherwise untouched. It's all in the details and keeping the weight down.
You must understand that other cars have developed further since this car was on the track with the multitude of diffusers used these days. It would still be interesting to see what it would run against them even without further development in the last 5 years.
HKS always sets the benchmark with projects which takes others years to catch (R33 GTR Drag / S15 Silvia Drift / CT230R EVO Time Attack). All these cars were built and dominated the sport then retired. You then see others trying to still beat the records years after HKS have switched their focus elsewhere.
You are more then welcome to come to GT Auto's Open Day and have a good look over the car in detail and not under the pressure of World Time Attack. It can also be sold if the money is right but $130k doesn't come close sorry.
Cheers
Marty