HKS 1599-SN003 Air Flow Less Adaptor for 1989-2002 Nissan Skyline GT-R RB2

Vehicle Fitment

• 1989-2002 Nissan Skyline GT-R (BNR32, BCNR33, BNR34)
• Engine: RB26DETT 2.6 L twin-turbo
• Fitment applies to vehicles with factory or Nismo mass airflow meter
• Adapter allows removal of factory airflow meter when converting engine management

Features

• Air Flow Less Adaptor reduces suction resistance from the stock airflow meter
• Improves throttle response and airflow characteristics with converted intake
• Precision-machined buffed aluminum body for durability and smooth airflow
• Includes a boss for installing an intake air temperature sensor (modification required)
• Works well with standalone engine management systems (e.g., F-CON V-Pro)
• Ideal upgrade with high-flow intake systems like Racing Suction Reloaded
• Helps optimize airflow for tuned or high-performance RB26DETT engines
• Simple bolt-in redesign replaces restrictive factory airflow meter flange

Specifications

• Part Number: 1599-SN003
• Application: Air Flow Less Adaptor for Nissan Skyline GT-R
• Chassis: BNR32 / BCNR33 / BNR34
• Engine Compatibility: RB26DETT twin-turbo
• Material: Buffed finish aluminum construction
• Adapter Diameter: ~70 mm flange type
• Installation: Replaces factory airflow meter interface
• Requires engine management capable of MAP-only control

Included Components

• 1x HKS Air Flow Less Adaptor (1599-SN003)

Product Description

The HKS 1599-SN003 Air Flow Less Adaptor is a performance intake component engineered for Nissan Skyline GT-R models (BNR32, BCNR33, and BNR34) equipped with the RB26DETT twin-turbo engine from 1989 through 2002. It replaces the factory mass airflow meter mounting flange with a precision-machined adaptor that eliminates the restrictive airflow sensing component. By removing the stock airflow meter, the intake tract experiences reduced suction resistance, offering smoother airflow and improved throttle response when running engine management tuned for MAP-only operation.

Constructed from buffed aluminum for durability and a quality finish, this adaptor also features a boss for installing an intake air temperature sensor (modification required), maintaining essential engine monitoring functions. It's especially useful for enthusiasts converting to standalone engine management systems like F-CON V-Pro and pairing with high-flow intake upgrades such as the Racing Suction Reloaded kit. Because it removes the factory airflow meter, it is not suitable for stock ECU configurations unless properly remapped or replaced.