I remembered that I have read a review online said original M3 strut bar is the best. He tried 3 options but then he had a N54 so there wasn't too many options.
E93 335i Alpine White, 19" Works, PSS, M3 arms, M3 bushings,M3 E93 FSB/E92 RSB, powerflex rear diff bush.
AST 5100 with M3 rear camber arms. GC street plates.