This uprated Td5 MAP sensor, suitable for Td5 Defenders and Discoverys, replaces the original MAP sensor on the inlet manifold - allowing the correct use of a higher turbo pressure. Like the sound of that? We aren't suprised - especially when it's only £180. 

This sensor allows a controlled boost of up to 3bar to be applied, depending on engine and turbo mods, while still retaining the boost limiter in the event of an engine fault.

Quite frankly, this is money well spent.