I called 5 different local shops for prices on installing the headers. When I called, I asked "Do you guys install headers?" they all pretty much said "all day, what kind of car?" I told them nissan titan. they said "don't work on that truck" when I asked why, all said because of the lifting the engine and one said they have weak bolts which break into the block. I heard that it could be done without the engine being lifted. if i have to raise the engine i will, i will. what about the bolts are they really weak and break? I know my 91 pathfinder had that issue, when I took the stock exhaust manifolds outs, half the bolts broke into the block. anyone know of a place in southern cali, san fernando valley area that does Titans??? thanks....