Based out of Quakertown, PA, Valvetronic Designs is a company that manufacturer's and produces complete exhaust system kits made from stainless steel all the way to full titanium. Their valved systems allow you to open and close the valve from the comfort of the driver seat to go from stock to balls-to-the-wall loud at your pleasure. In addition to their kits that come plug and play ready - they also offer universal mufflers that can work in virtually any setup.