Aem failsafe boost and afr gauge.

[rs250nut]

Don't know if any of you chaps have seen this but it could be a great bit of kit as it has an in built alarm and low current output trigger to protect against lean afrs.

http://www.aemelectronics.com/wideband-air-fuel-systems-15/wideband-failsafe-gauge-84/

[markey b]

they look pretty flash, my aquamist dds3 has a similar function but not as clever