Breaking of standard 168 limited slip differential cap is a problem that happens more than often especially on higher HP engines.
When you are changing ramp angle to 30°/30° or 30°/60° you increase chance of cap breaking a lot.
So this reinforced steel cap is a permanent solution. By installing this you will avoid cap breaking for good.
And when you wish to upgrade 188mm LSD with 4 clutch set, than this is a must have.