o2 sensor question

[ebpda9]

i think you need only one sensor for the pre-obd setup, and yes it will go in the exhaust manifold. my car is a obd1 and still requires only a O2 sensor. as for the turbo the car will still need only one sensor since you are using the same ecu. As for brands go look for a universal sensor for around $40 a bosch or something.