HKS RELOADED Air intake kit to suit 

    HKS 70019-AN109

SKYLINE    GF-    ER34    RB25DET    98/05-01/06    Super Power Flow R    Φ200-100/Green
    
Ambient exposure type air cleaner has larger area of induction inlet that increases intake air volume.
Engine horsepower and torque will be more than panel filters. Without air cleaner box, intake sound will be sporty.

Especially at high RPM, it will let you experience the smooth and powerful performance. And the sound is much better than the stock. You also don't need to reset the ECU because it doesn't have influence on stock feedback.

Kit comes with everything needed to install.