[MtPaul401]

I'm looking at the order form and I don't know what some of the abbreviations are or where to find some of the info....I'm still fairly new to the diesel world so don't have a lot of background here....
where do I measure my exhaust down pipe to get the proper diameter?
what's intercooled?
how do I find out my max boost PSI?
what's flow rate CC mean?
how do I find out stall RPM, or is that part of a mod torque converter?

Thanks!