I'm not to sure on the vents, honestly never messed with it but ill see what I can find out. IMO steer clear of glowshift. The price is right but why trust a cheap gauge to a multi-thousand dollar rig? I run a quad pod in mine with air pressure (for air horns), boost, pyro, and eng oil temp with isspro EV series gauges. I got em from
http://www.kensperformancesolutions.com/home.html good prices and his customer service is great. When I ordered online he called me about half hour later to conferm the order and make sure I got everything I needed. Shipping was very quick too.