im installing headers on my 97 4.6. i didnt get done tonight and may need to drive tomorrow. i have the exhaust taken off from the manifolds back; well from the driver side header which i got on and the passenger side manifold. i unplugged the o2 sensors to get the pipes off. will the truck run like this or will the a/f ratio be off and mess it up

 

without the Front o2's it wont run right as for the sound of open headers...look at the vid in my sig. but without the front o2's your truck is going to guess how much fuel and o2 to add to combustion. i think it has a set sim number in case something happends to the o2s and they fail. but it wont run great. try not to drive it open headers for to long...500.00 dollar ticket and its not good on ur valves.

 

thats what i thought...