APEXi N1 Evolution mufflers combine all of the racing heritage and proven performance of the original N1 mufflers, but raise the ante with lighter weight and fully polished stainless steel material. These are the ultimate N1 exhaust components, constructed to deliver maximum power gains and resistance to rust and corrosion. Like the original N1s, Evolutions are built to facilitate greater exhaust flow. APEXi N1 Evolutions were created for those who are looking for something one step further than the classic N1 design. Order the fitment and options tailored for your vehicle application.