This is the last header you will ever need to buy! Our T.I.G. welded 304 Stainless exhaust header is designed for long-term heavy use. They are manufactured from durable 16-gauge steel and have a 3/8" THICK flange that are heavy enough to maintain header integrity, yet pliable enough to seal each exhaust port. It's also port matched to work on the Suzuki's rectangular exhaust port. Other headers use a round port. What does that match? The header also features an 02 sensor port at the 3-bolt flange. The CALMINI header adds horsepower and increases fuel economy. Our headers are designed to fit the vehicle as it came from the manufacturer. Installation of this kit is fast and easy with complete hardware and detailed instructions included. Complete kit includes header, upper flange gasket, collector kit, lower flange gasket, hardware and installation instructions. Minor welding is required to connect the collector into the factory exhaust system. ** Not for street use on pollution controlled vehicles **