Just bought a set of hsv 340 clubsport headers/cats. I'm planning on fitting them up this weekend. Just wanted to ask, Is it ok if i drive the car with them on without the rear O2 sensor connected? I know it will illum the dash light, but can I cause any damage? Have tune booked for first week of october, so it will be tuned/OTR fitted then and they'll just shut off the rear sensors i imagine.