Snorkel

Raised air intake / snorkel for the Land Rover Defender 300TDI and TD5 models only.

Possibly one of the most important, but least considered upgrades you could give to your Defender. The real likelihood of the flood or River crossing being deep enough to require a snorkel let alone the work needed to completely weather proof your engine and electronics, cool air helps with performance of the engine as well as helping cleaner air being drawn into the engine.