Upgrade your vehicle’s exhaust system with these stainless steel exhaust headers for 2009–2013 Nissan 370Z and 2008–2013 Infiniti G37 3.7L V6 engines. Featuring 2.0-inch inlets and 2.5-inch outlets, these headers are engineered with CNC-machined flanges and TIG-welded construction for strength, precision, and durability. The 4-1 performance design improves exhaust gas flow, helping reduce backpressure for better throttle response. Dyno-tested to deliver up to 15 horsepower and 20 lb-ft of torque, they provide an ideal balance of performance and reliability. With a polished stainless finish and direct bolt-on fit, these headers are a dependable upgrade for any performance build.