MBRP S5314409 T409-Stainless Steel Single Side Cat Back Exhaust System Mirror polished T304 stainless steel tip Delivers a rich, mellow exhaust note Installs with common hand tools Can improve fuel economy by 1-2 mpg Boosts torque and horsepower Mirror polished T304 stainless steel tip Delivers a rich, mellow exhaust note Installs with common hand tools.Heavy-duty construction Can improve fuel economy by 1-2 mpg Boosts torque and horsepower