The MagnaFlow Competition Series Exhaust Systems are designed for those seeking maximum performance, reduced mass and an aggressive exhaust note that demands attention. These systems may not comply with all local or federal noise requirements. * All Mandrel Bent Tubing * 409 Stainless Steel Construction * Increased Horsepower and Torque * Lifetime Construction Warranty * Made in USA PartNumber : mag19420 Description : SYS CB 17-18 Honda Civic SI 1.5L Main Piping Diameter : 2.5 Material : Stainless Series : Competition Anticipated Ship Out Time : Approximately 1-2 Days Attachment Style : Bolt-On Color/Finish : Stainless Exhaust Inlet Connection Type : Bolt-On Exhaust Pipe Material : Stainless Muffler Quantity : 3 Muffler Body Height : 5 Muffler Body Width : 5 Muffler Body Length : 14 Muffler Overall Length : 14 Muffler Body Diameter : 5 x 5 Muffler Body Material : Stainless Muffler Body Finish : Polished Muffler Body Shape : Round Muffler Configuration : Center/Center Muffler Inlet Diameter : 2.375 Muffler Outlet Diameter : 2.375 Muffler Type : Straight-Through Sound Level : Aggressive Exit Location : Dual Center Rear Exit Quantity : Dual Recommended Use : Performance System Type : Cat-Back Tip Type : Double Wall;Angle Cut Tip Diameter : 4.5 Tip Finish : Polished Tip Length : 5.75 Tip Material : Stainless Tip Quantity : 2 Tip Shape : Round Warranty : Lifetime Title : Cat Back Attachment Type : Bolt-On Exhaust Type : Cat-Back Exit Position : Dual Center Rear Finish : Stainless Inlet Connection Type : Bolt-On Main Piping Diameter (in.) : 2.5 Muffler Body Diameter (in.) : 5 x 5 Muffler Body Height (in.) : 5.000 Muffler Body Length (in.) : 14 Muffler Body Width (in.) : 5.000 Muffler Count : 3 Muffler Inlet Diameter (in.) : 2.375 System Type : Cat Back Tip Diameter (in.) : 4.5 Tip Length (in.) : 5.75 Muffler Outlet Diameter (in.) : 2.375 Muffler Overall Length (in.) : 14 Tubing Diameter : 2.50 in. WARNING CA Proposition 65 : No California Proposition 65 : WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov Muffler Body Diameter : 5.000 in. x 5.000 in. Muffler Body Length : 14.000 in. Muffler Body Width : 5.000 in. Muffler Inlet Diameter : 2.375 in. Muffler Outlet Diameter : 2.375 in. Tip Type : Double Wall Tip Length : 5.750 in. 2017-2018 Honda Civic Si L4.1497cc Exhaust, Mufflers & Tips::Catback