Overview:Increase your horsepower and torque for your Nissan or Infiniti by bolting on these shorty headers from Flowtech. These headers are designed with 3/8" thick laser-cut flanges, 1-5/8" mandrel-bent primary tubes. They're available in either 304 or 409 stainless steel and are offered in a Natural or Polished finish for your application. These Flowtech headers include premium-quality gaskets and detailed installation instructions. These shorty headers have been engineered and designed to fit the vehicle as it came from the manufacturer.Features: Smooth transition 1-5/8” mandrel- bent primary tube diameter for smooth flow and increased exhaust velocity resulting in improved torque and horsepower over factory manifolds 2-1/2” Collector diameter connects to factory exhaust 3/8” Thick exhaust flange for maximum strength and leak-free seal Heavy Duty 16-gauge tubing for increased strength and durability Available in 409SS (17000FLT- Natural Finish or 17001FLT – Polished Finish) or 304SS (17002FLT – Polished Finish) materials for long term good looks and corrosion resistance Premium header gaskets included Application: 2004-2015 Nissan Titan 2005-2015 Nissan Armada 2004-2013 Infiniti QX56 2004 Nissan Pathfinder Armada Specs: Brand Flowtech Collector Diameter 2.50 inch Emission Code 4 Finish Natural Header Finish Natural Header Style Shorty Primary Tube Dia. 1-5/8 inch Product Type Headers Tube Material 409 Stainless Steel Warning California Proposition 65