my truck is a 06 4x4 dually it already has a smarty tunner, aft intake horn, 5' exhaust, pacbrake ebrake. i just perchased the ats twin set up where it uses the stock trubo for the small turbo the aurora 5000 for the big turbo. my quesion is what else do i need to do the engine to take to boost from the turbos. i know that i need head studs. being that i am running twins and the ebrake iv been told by some that i will need bigger valve springs and need to fire-ring the head. will i be able to get away with just head studs for now or would that be asking for trouble. since this truck is my daylydriver, pulling the head to get it fire-ringed and new valves put in is not an option as right now, as i cant have the truck down for more the just a weekend. i would realy like to have twins but if i have to wait i will.