Expert's advice:
Upgrade the Mosselman Single Oil Cooler Kit of your BMW 3-Series E9x to a Twin cooler setup with this Twin Cooler Extension Kit E9x. The twin setup is recommended for cars in a very warm climate and cars that will be used on a track.
The Twin Extension kit comes with the 1x Setrab 19 row oil cooler, 1x stainless Mosselman bracket, 1x Mounting bracket, and a hose kit (1 oil hose).
Note: This item is not ''plug-and-play''. You will need to make some adjustments to the car to fit the bigger oil cooler and bracket. Additional OEM products that you need for the installation are: oil cooler front air duct (left), wheel arch air duct (left), inside wheel arch for the auxiliary cooler (left).
Mark Hendrikx - Automotive engineer at Mosselman