Remarkable Power RK7515-2.5" x 4" Heavy Duty Stainless Steel Exhaust Flex Pipe Brand New Double Braided Flex Pipe 2.5" x 4" Inlet/Outlet Diameter: 2.5" Flex Pipe Length: 4" Flex Pipe Total Length (including extension): 4" Directly bolt-on with no modification required Profession Installation Highly Recommended