RELIABILITY BACKED FOR A LIFETIME - ARMOR PLUS Series exhaust systems are crafted from corrosion-resistant T409 Stainless Steel - a value-oriented material designed to protect from penetrating rust and will stand up to almost anything you can throw at it.T409 Stainless Steel tubing is easy to clean. If you're looking for a performance exhaust system with a Lifetime Warranty, this is probably the one for you. If you don't find yourself faced with lots of precipitation and salt, this is all you're ever going to need. All of the tubing is mandrel bent for maximum exhaust flow. Mandrel bending ensures no rippling in the bends. The end result is that it gives you more fresh air inside your engine's cylinders, allowing it to produce more power and improve vehicle performance and longevity. Its important to note that T409 Stainless Steel is resistant to penetrating rust but winter conditions, heavy salt air, and road treatments might accelerate the corrosion process, these conditions are not covered by MBRPs manufacturer warranty unless the part or system fails completely. When it comes to a performance exhaust system, choose the MBRP ARMOR PLUS Series for a reliable option backed for a lifetime. MBRP, Stand out from the crowd with a performance exhaust system that sounds great.Specifications: Exhaust Type Cat-Back Exit Position Dual Center Inlet Inside Diameter 3.000 in. - 2.500 in. Material 409 Stainless Steel Tail Pipe Diameter 3.000 in. Tip Diameter 4.000 in. Tubing Diameter 3.000 in. WARNING CA Proposition 65 Yes WARNING CA Proposition 65 Message WARNING: This product can expose you to chemicals including nickel (metallic) and chromium (hexavalent compounds) which are known to the State of California to cause cancer and birth defects; or other reproductive harm Description_DES Armor Plus Cat Back Exhaust System Description_EXT Armor Plus Cat Back Exhaust System; 3 in.; Incl. Ext. Pipe/Muffler/Resonator/Over Axle Pipe/Tailpipe/Hardware/Dual 4 in. OD Black Tips; Dual Center Outlet; T409 Stainless Steel; Description_FAB Improved Torque And Horsepower Description_FAB Lower Exhaust Gas Temperatures Description_FAB Increased Throttle Response Description_FAB Mellow Exhaust Note Description_FAB Bolt On Design Description_FAB Utilizes OEM Hangers Description_FAB Stainless Steel Tips Are Included Description_FAB Limited Lifetime Warranty Description_MKT RELIABILITY BACKED FOR A LIFETIME - ARMOR PLUS Series exhaust systems are crafted from corrosion-resistant T409 Stainless Steel - a value-oriented material designed to protect from penetrating rust and will stand up to almost anything you can throw at it.T409 Stainless Steel tubing is easy to clean. If you're looking for a performance exhaust system with a Lifetime Warranty, this is probably the one for you. If you don't find yourself faced with lots of precipitation and salt, this is all you're ever going to need. All of the tubing is mandrel bent for maximum exhaust flow. Mandrel bending ensures no rippling in the bends. The end result is that it gives you more fresh air inside your engine's cylinders, allowing it to produce more power and improve vehicle performance and longevity. Its important to note that T409 Stainless Steel is resistant to penetrating rust but winter conditions, heavy salt air, and road treatments might accelerate the corrosion process, these conditions are not covered by MBRPs manufacturer warranty unless the part or system fails completely. When it comes to a performance exhaust system, choose the MBRP ARMOR PLUS Series for a reliable option backed for a lifetime. MBRP, Stand out from the crowd with a performance exhaust system that sounds great. Description_SHO Exhaust System Kit This Part Fits: Year Make Model Submodel Notes 2013 Ford Focus ST 2014 Ford Focus ST 2015 Ford Focus ST 2016 Ford Focus ST 2017 Ford Focus ST 2018 Ford Focus ST