i'm kinda new to all the diesel upgrades and products that are out there. there seems to be too many to choose from. some parts seem to be regional. its like some parts are more popular in some areas than others. i have had my truck for 2 years before i started upgraded components. i know for me, i wanted a complete system that i could trust, instead of buying this or that. i researched long and hard about what to buy. i finally decided to go with the banks big hoss bundle. i know it was probably higher than if you mixed and matched from diff. manuf., but i liked the idea of getting everything in one shot. i'm not knocking other products, i am sure you can combine products to really turn a truck up and they may have more power combined that the banks system. banks including very good instructions for each part, i had the dual exhaust installed at a local muffler shop, we left the cat off, i installed the intercooler and boost tubes myself, took about 6 hours, and i had a local diesel shop install the six-gun, i couldn't find the time to do it myself. i guess it boils down to personal preference.