The most recent package from company was the GT570 racing kit for the GT-R. Already on sale in the U.S. for $5,700 as a race-only conversion, the kit includes 75mm racing extension pipes, new intercooling piping, a reprogrammed ECU, a sequential blow-off valve kit, reinforced actuators, and new spark plugs.
HKS has now released an updated GT600 package in either Racing or Sport lines. The new GT600 is kit is based on the previous GT570 package and essentially add a new induction kit with large diameter intakes, a fuel regulator and a fuel pump. The only difference between the Racing and Sport lines is the exhaust system, which for the street-legal Sport trim has been toned down to pass emission and noise regulations in Japan.
According to HKS’ own dyno chart the addition of the GT600 package boosts power to 592hp (441kW).
No word yet on any U.S. release dates or prices, but the kits are available now with a starting price of ¥882,000 (approximately $8,965).