I need to mail order a drop-in exhaust system that goes from the headers all the way back. The one in the LMC Truck catalog won't fit the K5 without some modifications which I don't have the equipment to do. I want to find a pre-made kit that literally comes out of the box and bolts onto the truck without any modification. Does such a thing exist? Everything on the truck is stock. I am trying to avoid going to the exhaust shop because the guy wants close to $500 for the job.