Stainless Straight Pipe kit for 4 inch Banks Power Monster Exhaust Systems. Does not replace OEM muffler Replaces Muffler 53283 used in 2004 - 2007 5.9L Cummins 4 Inch Monster Exhausts. Includes 4 - inch x 41.5 - inch Exhaust Straight Pipe and all necessary hardware. Banks Power Straight Pipe Kits are made from durable galvanized T - 409 Stainless Steel. These kits come with necessary hardware for the applications listed in their description. Straight Pipe Kit, Replaces Muffler PN 53283 For use with 4 inch Monster - Exhaust systems for 2001 - 2007 Duramax and 2004 - 2007 Cummins 25003500 5.9L trucks.