Remarkable Power RK7553 Exhaust Flex Pipe 3" x 12" Heavy Duty Stainless Steel 16"OL Brand New Flex Pipe It comes with 1 Piece of Double Braided Flex Pipe 3" x 12"; Inlet diameter: 3 inches Directly bolt-on with no modification require Flex Pipe Total Length (including extension) : 16" Profession Installation highly recommended,no Instruction will be provided