The APEXi N1 Evolution exhaust system combines all the racing heritage and proven performance of the original N1 muffler but raises the ante by adding light weight, fully polished stainless steel piping. Mandrel bent, full stainless steel construction provides maximum power gains and resistance to rust and other damage caused by weathering. Like the original N1, the N1 Evolution is designed with the least possible bends to allow for greater exhaust flow. The N1 Evolution was created for those who are looking for something one step further than the classic N1 design. Available only for select applications, the N1 Evolution stands as a brilliant testament to exhaust system fabrication.