DeatschWerks was the first to market with a 100% drop-in fitment injector for the new GT-R. We know the GT-R is a special machine. That is why we take our level of perfection to a whole new level for this application. We hand balance each set individually both statically and dynamically to a 1% or less variance. Our injectors recently propelled the AMS GT-R to a record setting quarter mile time of 10.48@134mph. All sizes feature the following... Flow rates and set balancing in-house by DeatschWerks Flow balanced to within 1% (flow report included) High Impedance coils to match OEM ECU 100% drop-in fitment (no connectors or adapters required) Excellent spray pattern and atomization for excellent idle and tuning Technical assistance and tuning data available via phone or email 12-month comprehensive warranty