exhaust question

[Ritzbitz]

I have a 93 hatch with an ls swap. i wanna put a high flow cat in the exhaust due to the fact that the guy i got it from welded and peice of pipe where th cat goes. now my qustion is where is the o2 connector located and what o2 do i need? one form a 93 hatch or one from the teg the engine came from?

 

[thatBrownGuy]

it should be obd 1 so the only O2 sensor the car has should be in the header, no sensor in the cat, and u should probly get the o2 sensor from the b18b

 

[Ritzbitz]

I have headers on it do no o2 hole on it but the high flow cat has the o2 hole on it, also the engine harness is from the stock engine not the LS