Originally Posted by benzy89
You sure it's not just condensation built up in the exhaust that's more noticeable now that it's winter? Take some logs & see if you're still hitting the right boost levels. Otherwise I think Vargas Stage 1s are ready to go, PM Tony on the ETA for Stage 2 + 3s (if you're going that aggressive)
Car is pulling like a freight train... trust me.
2009 135i 6AT
E40 PTF Protune, AR Dp's, 5" ETS FMIC, BMS DCI, M3 RSFB's, Koni Yellow Shocks, Michelin PSS