Exhaust Header Performance Header Performance Header; Stainless Steel; 1 5/8 in. Tubing; SPECIFICATIONS: Application: Automotive Coating/Finish: Stainless Steel Collector Tube Size (in.): 1.625 Engine Make/Size: Chevy 6.0L Material: Stainless Steel Port Shape: Round Tube Direction: Down Swept Tube Diameter: 1.5 FEATURES: Heavy Duty 409L Stainless 16 Gauge Tubing Mandrel Bent Tubing Heavy Duty 3/8 in. Thick Laser Cut Port Flanges Premium Gaskets and Hardware No Welding Required Uses OEM Style Connections Every Gibson Performance Header is Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds. Improves engines ability to breathe and cooler operating engine temperature. Designed as a direct replacement for the factory manifolds, using the stock crossover pipe. They are well suited for lowered and raised vehicles, street and off-road. 50 State Street legal. Meets EPA and CARB requirements. Will not affect the factory warranty. No welding required. Backed by a Lifetime Limited Warranty. Uses OEM style connections. 3/8" Heavy Duty Laser Cut Port Flanges- No Warping or Leaking. Premium Gaskets and Hardware included. Backed by a Lifetime Limited Warranty. Gibson Exhaust is a leading manufacturer in aftermarket performance exhaust systems for your Truck, SUV ,American Muscle Car or Off road vehicle. Every exhaust system is designed for hassle free, bolt on installation with professional looking results. Gibson's exhaust systems are engineered & dyno-tested to decrease backpressure, and produce more torque, with increased horsepower and better fuel economy. Proudly Made in the USA and backed by a Lifetime Limited Warranty.