Originally Posted by aus
You could change out the suspension arms on the 335 5o the M3 arms for about $1,500 installed. Then you'd be talking a nice ride for much less than an M3, particularly for daily driving.
Doesn't matter, you still are not going to get the handling limits of the M3. The M3 has a wider track (wheel base) and stance, plus quite a few other tweaks chassis wise that no bolt on can replicate.
No matter what you do to a 335i, you will not achieve the handling limits or feel the M3 has.