Brand KAX Tip Size 2.5 Inch Muffler Included Yes Fitment 2008-2014 Subaru Impreza WRX/STI sedan models only Pipe Diameter 3 Inch Materials T-304 stainless steel - Made of high quality full T-304 stainless steel with burnt tip. - Japanese N1 style. Deep smooth tone guaranteed. C.N.C. mandrel bent. - Increases up to 15 hp. - Comes with gaskets, hanger and bolts. 2.5" outlet tip 3" piping. - FITMENT: Compatible with Subaru Impreza WRX/STI sedan 2008-2014 models only. High Quality Made of High Quality T-304 Stainless Steel. We do rigorous testing on the strength, durability, as well as longevity of the material in order to make sure when the product arrives at the consumers end that it’s ready to go without worries. Pure Performance Aggressive deep and smooth tone. Every KAX exhaust system is designed for maximum airflow and validated on our in-house dyno to ensure performance across the entire powerband. Well-Designed The larger pipes, low-restriction mufflers, and tuned resonators of a well-designed performance exhaust system can make stunned effect on your vehicle: lower auto exhaust back pressure and a much better sound. About KAX ® KAX, one of the star brands of SuncentAuto, was built in 2018 by experienced automotive experts. The dedicated team ensures that users receive advanced technology products and their overall driving experience is improved with their mindful innovations. Although the brand has been introduced a couple of years back, the team consists of experts who are into the automotive industry for more than two decades. Warranty: We accept authorized returns within 90 calendar days from the date the product was received by the buyer or original recipient unless otherwise specified at the time of purchase.