Newly Designed Stage 5 System304 brushed stainless steel mid & head pipes Dual aluminum mufflers brushed finishFully Tig Welded6061 Billet Muffler Clamps 6061 Billet Machined Exhaust TipsOxygen sensor bungUSFS approved spark arrestorsSignificant horsepower and torque gains2 year warrantyMade in the USAINSTRUCTIONS