Being a 2nd gen truck, you will have many decent exhaust manifold choices to choose from. PDI has been making exhaust manifolds for the OTR industry for a long time and I feel that their casting and finish work and quality control is top shelf. I would stay away from AFE for the the very same, but opposite, reasons. Most people choose to run a PacBrake compressor actuated EB, though some also run the BD vacuum operated EB. SInce you already have a vacuum pump on your truck, it might be easier to run the BD, though if you want to add on board air for any other reasons, I would recommend going with the Pac unit but use an upgraded and upsized compressor and tank then the ones they offer.