Using this Pusher SuperMax Intake System is easy. First, make sure your vehicle is a 2004.5 - 2005 GM with an LLY 6.6L Duramax engine. All the necessary parts like HD 4 - ply silicone couplers, stainless T - bolt clamps, o - ring gaskets, hardware, and a wire loom are included in the package. You can install it according to the general installation steps for intake systems. Remember, this product is only for off - road use because it's not emissions compliant. For maintenance, check the welds and connections regularly to make sure there are no air leaks. If you want to customize it with different powder coat colors or extra ports, just pay the additional charge. If you need it quickly, contact the seller to check stock levels as most of these products are special orders and may take 2 - 3 weeks to arrive.