BMW E30 Differential Breather Kit

BMW E30 Differential Breather Kit

  • $89.00

This kit lets your BMW E30's rear differential breathe clean air, and prevents fluid loss in case of foaming.  We've designed a special fitting to replace the steel vent tube pressed into the top of the differential cover and a small breather tank made to be mounted to the back of the rear seat within the trunk.  The kit uses a plastic encased foam breather filter to keep dust out.  The catch can bracket has two predrilled holes for mounting to the trunk firewall.  


  • Aluminum 50mm(2") Diameter by 100mm(4") Tall Catch Can
  • Breather Filter
  • Anodized Aluminum Differential Cover Adapter Fitting
  • 800mm(32") Length of Fuel Line
  • Loctite 680 Packet
  • Rubber Grommet
  • German Made Hose Clamps 2X


  • "Vicegrip" or "Channellocks" to remove steel breather
  • 22mm(7/8") Drill or other method of making a hole in the trunk floor
  • 6mm hex driver or Phillips screwdriver
  • Mounting hardware of choice 2X