Just modified my 2011 335i. Added downpipe, front mounted intercooler, and a tune. Typically cars with those mods make around 330 whp and somewhere around 400 wtq. It's more power than one can use, really, since the tires tend to spin in 1st and 2nd gear, and any hard acceleration puts me at 90 mph in just a couple seconds so I gotta slow down quick.