Differential Stud Kit - (E30, Z3, E28) K0038-PBL-CEA-CAR is in stock. 3 series: E21

3 series: E21

It was made with comfort in mind

These upgrades provide improved sway bar geometry

This upgrade is a must

Differential Stud Kit - (E30, Z3, E28) K0038-PBL-CEA-CAR is in stock. 3 series: E21BMW DIFFERENTIAL STUD KIT E30, Z3, E28 OVERVIEW Introducing our diff stud kit conversion. This is one of those mods that you will be glad you did, the next time you need to service your differential. This makes taking the differential in and out of your E30, E28, or Z3 a lot easier. This now becomes a one person job (and safer). It can be a little difficult to balance the differential and line up the bolt holes during re installation. They never seem