MSW’s Take: We run these guides on all our race cars. We wouldn’t recommend them on a street driven car due to the increased servicing requirements, but on a track-only car they are a must. They help reduce pad taper and also unnecessary caliper movement.
Fits nearly all BMWs with ATE calipers
3 Series: E30/36/46/9x (Excludes E90/92 M3 & 335i)
1 Series: E82/88 128i only
5 Series: E28/34/39
6 Series: E24
7 Series: E32
8 Series: E31
Z Series: E36-7-8/85/86/89
Includes parts for one axle (two calipers), fits both front and rear ATE calipers.