ApplicationCompatible for BMW F80 M3 & F82 M4SpecificationProduct Specific : Downpipe diameter : 3\" 3inch Decat Pipe size: : 3\" x 2.25\" Thickness: 1.5 mm 1 X Downpipe Decat Pipe 1 X Set of gaskets, screws, fittings pipes as picture shows （ no instruction included in the pakage)FeaturesCondition: 100% Brand new Warranty: one year Material: T304 grade stainless steel, anti-magnetic and not easy to get discolouration. TIG welding: super strong , prevent cracking, and long-lasting durability Flanges :CNC machined for strong, solid support and an accurate fit Surface: Hand polished mirror polished. Integrated flexi section: helps reduce exhaust strain Smooth and deep tone sound Installation notice：Direct fit bolt on, no modification needed, to ensure the correct fitment, we highly recommend you find a professtional mechanic to help you install it.NoticeDesigned to improve power and torque across the entire RPM range Noticeably improves throttle response One of the most cost effective ways of releasing power from your car With this Down Pipe between the turbocharger and the exhaust system, it could Increase both power and acceleration, the turbocharger can work better more efficiently and the exhaust gas temperature decreases significantly. achieve a significantly increased engine power and a higher torque. you can achieve a distinctive exhaust sound.Noticeable performance increase