I just baught a used LT8. It has been used on a S4 with streetport. I got a s4 stock, with 3" exhaust. Will it run to rich? The seller said it should be quite plug and play, but maybe i have to adjust the fuel something. Can i se the a/f ratio on microtechs screen when using a one lead o2 sensor? Or do i have to purchase a WB o2 sensor with a standalone screen?

Sindre

 

Sindre - Yes it should run rich on your car and yes it will need some tuning. A WB O2 is the only way to tune, a 1 wire O2 sensor is a narrowband and not nearly accurate enough to tune by.
-John