The ETS intake system utilizes a stock size MAF housing that doesn't require any retuning. You can bolt this on and notice immediate performance gains! Our intake also utilizes a custom billet 5" velocity stack to help funnel as much air as quickly as possible through our intake. This combined with a huge K&N filter gives us the most filter surface area and flow possible. The filter is specifically placed to allow the use of the factory ram air duct. If you want to keep things looking stealthy under the hood we also have an airbox available as well (You can select this from the drop downs below). This helps to isolate the intake from the hot engine bay temps and provide the coldest and most direct intake charge. Backed by our manufacturer's warranty and the best customer service in the industry, you can buy this knowing the fit an finish will be unlike any other product on the market.