I'm looking to squeeze a few more horsepower out of my s4 n/a, and am wondering what ECU I should use.... I am hoping to NOT have to re-wire too much; I know very little about EMS upgrades, so bear with me, please.

I would like to do this as easily as possible. I'm running with no catalytic, 2.5" all the way back, and a Borla catback. Stock header. true cool air intake.

So, what ECU upgrades/replacements should I look at for tuning?

 

easiest is the rtek, plugs right in, you just adjust the stock map...

 

What about just using a SAFCII? It's cheap and can save you gas while increasing a few ponies!

 

rtek is plug n play, and you can adjust timing too. safc works well too, but its a little more limited