5.0 02 sensor going out with bbk long tubes

[Austin4593]

Hello I'm new to posting on svt I have a 2014 5.0. I just installed bbk long tubes bbk throttle body c&l intake off-road x and jms email tune. I replaced the O2 3 times already in the past 4 months I notice a horrible idle at a cold start and the car should be rolling a lot faster than it is. I put it on a dyno only got 350rwhp out of her. I'm wondering if a bad O2 can make it that bad or is it something else. Fuel was on the first pull on the bottom

 

[mizlplix]

Several things kill O2 sensors. Heat, extremely rich on fuel and sometimes a fuel heavy on ethanol.

At first guess, I would say heat. Try another tune.....or get a good tuner to tweak your ECM.

Miz