STILLEN 508275 Stainless Steel Axle-Back Exhaust System - 08-13 Altima Coupe Axle Back Exhaust System; Stainless Steel Construction Polished Stainless Tips, End Pipes and Mufflers Increase of Horsepower and Torque Mild at Idle/Cruising - Aggressive Note Under Throttle; Limited Lifetime Warranty