Fitment Information Nissan Altima 3.5L L32 Sedan (2013, 2014, 2015) Specs & Features Complete Cat-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 when purchased through Redline360 (authorized dealer) STILLEN's Nissan Altima Exhaust Systems are built for power. Power that you can feel across the power band with a big gain on top. Mileage gains during highway travel can be expected as you cruise at steady speeds. The free flowing performance Mufflers themselves are aluminized or stainless steel for long life. This fit and finish are second to none. The improved airflow created by addition of the exhaust is verified by the significant dyno HP increase. Adding the STILLEN Exhaust to your Nissan Altima is a must. Actual product may vary slightly from image. We carry stainless steel Altima exhaust systems including Altima cat-back exhaust and Altima axle back exhaust systems. Choose the Altima exhaust you prefer above or give us a call today to speak with an Altima exhaust expert. Proudly made in the USA.