The HKS GT Extension Kit increases airflow by replacing the restrictive factory O2 Housing with a Stainless Steel free flowing unit.  On certain applications, this replacement O2 Housing will also include an integrated downpipe for maximum performance.


Part Number: 1418-RN005


Fits the following vehicles/engines

* Nissan Skyline/ RB26DETT

HKS Extension Kit RB26DETT (1418-RN005)

    • Piping: 60.5mm x2 Main / 38mm x2 Bypass