zapp109

iTrader: (13)

Asking this for my buddy I'm helping. He bought the eBay turbo headers for his twin setup, going to be running a speed density tune with 0411 pcm and hptuners do you need O2 sensors? No holes in headers for them so figured I'd ask.

JoeNova

You can do without them, it will just need to run in open loop with a wideband.

RonSSNova

iTrader: (3)

I think closed loop is a benefit myself. But to each his own.