Stock bar is 13 mm on the 328i/330i/335i/340i/435i/440i w M-Sport which means the new bar can be adjusted from 243% to 329% stiffer than the stock rear sway bar.

Features

Front - Large 28mm size (stock bar is 21.2 to 24.2mm depending on application); Rear - Large 19mm size (stock bar is 12-15mm depending on application)

Front - 3 hole bar with 3 possible positions on bar; Rear - 3 hole bar with 3 possible positions on bar

Tubular (hollow) construction

Only tubular anti-roll bars with a large range of adjustment on the market

Less body roll

More mechanical grip

More stable at the limit