Sorry i missed the thread man...but Welcome to the forum!!!!!
EGT stands for Exhaust Gas Tempurature. As far as where to go for the best mods and prices, YOU ARE ALREADY HOME!!!! lol
There are ample threads on here about mods, and if you have any further quesions, feel free to ask!!! Also, our site vendors such as Discount Power Parts, BD power, Cowboy Diesel Performance, etc, etc are AWSOME and will give you the best possible price if you actually contact them. A lot of times the price listed on their website is not as low as they can actually go...just private message, email, or call them up and they will help you out. Here is the link to our vendor area.....
Marketplace