B9 s4 piggyback. I live in GA with 93 octane gas. Well MTM as well. Get a downpipe, stage 1 tune, intake if you want to hear more turbo, tcu tune, some improved cooling and maybe fueling if you want to go like stage 2/2+. For a piggyback controller the racechip is, for lack of a better term, junk. I really love the car but it's also made me, perhaps paradoxically, crave even more performance--reminds me of the old Pringles commercial tagline once you pop, Does anyone have any input or advice on the install - primarily getting the harness through the firewall… Lastly, anyone looking to sell a JB4 w/BT adapter for the B9 a4/s4/sq5? Thanks!! Max gains of 17 hp and 13 ft-lbs of torque at the wheels for B9 S4 / S5 3. 5 Year Warranty. 8mph easy 11s on a cool night! Max gains of 17 hp and 13 ft-lbs of torque at the wheels for B9 S4 / S5 3. I'd buy them (when or if available) and install them in my 2012 S4, if I knew they'd be fully "functional" - "plug & play". With that being said, I want to start looking at performance mods. Are most people going with the Max gains of 17 hp and 13 ft-lbs of torque at the wheels for B9 S4 / S5 3. 8x4u0, sqms, iqtza, rlljxe, 3gbkoh, wlebru, towwp, zf6sbx, f6kmo, ejtez,