HKS has developed fuel-related items with satisfactory performance in the course of drag racing activities that demanded extremely high power. This is an essential item for tuning cars such as drag, drift, and time attack.
HKS DHOB will increase octane number about 2 for premium gasoline and about 4.5 for regular gasoline. Safety margin increases due to improved knock resistance during sports driving. It also has a cleaning effect on fuel injectors.