Intake Cheap=Tymar DIY intake $50+/- Aftermarket AFE, airaid, but no K&N $200+
Exhaust Cheap= Cut muff out, weld in straight piece of pipe, under $50
Exhaust full cheap system= FarmboysDiesel Cat back 4" or 5" system. PM for Pricing.
Upper End Exhaust= MBRP, Diamond Eye, Grand Rock, among several others, prolly over $400 for SS
Chip, 4-6 position flip chips.
TS, DP, Wildman...all of these are good. Different prices depending on what ya get.
Guages, ask what is best, or you can go with a stand alone monitoring system like the Quadzilla Commander. Prices Vary
With any of this, pretty much any of the vendors can get ya prices on any of this. Just call them up or send them a PM.