This is a Bosch LSU 4.9 industry-standard heated 5-wire EGO sensor. These wideband air fuel ratio sensors are the very latest from Bosch and are used in many top quality tuning devices and also by professional dyno-tuners. Suitabe replacement sensor for the Prosport USA wideband kits.

DPR fuel rail kit - RB25
4G63 Turbo dump pipe EVO 4-6 Kinugawa
Lucas Octane Booster 444ml
D2 Racing coilovers - super racing series
DPR fuel filter with -6AN inlet and outlet 