After I install these do I need to get the ecu remapped.

 

I think you are going to want to so you don't risk running lean. I have headers, high-flow cats, and a new cat-back going on and have been in touch with Blackbear performance to get them to set me up with a tune to keep it safe.

 

My stock tunes have always ran rich after freeing up the exhaust restrictions. Always lost a **** ton of torque to. But yea, you are going to want a tune put on it. I'd have a tuner do this, not a hand held programmer.