Yeah, if you plan on going through some deep mud/water get some breather extenders. I purchased mine through Mantec in the U.K. and they came in a kit with the f/r axles, transfer box, and the transmission. They are very easy to install, the axles you just take the old banjo bolt outpull off the old breather, clean the bolt up put on the new supplied washer install the bolt back into the axle, and route the breather along the same route as the old one just terminating at a higher level. The back I ran up into the left side tail lamp. The transfer and trans breathers are located behind the coil packs. With those you clip the ends attatch the extension and run those to your desired location. The instructions have the front 3 breathers running to the top of the snorkel, which is great if you have a defender type of snorkel top with a cap to protect them in, but I have a 97 Disco and Mantecs snorkel doesn't give much protection from rain and melting snow from getting down the breathers. After getting some water in my trans/transfer cs I relocated to inside the cabin. Whew!! Hope that helped. If you can change your own oil then you can EASILY do this!Good luck.