Zstory JDM Twin Pipe Rear Muffler Stainless 240Z 260Z 280ZNew Zstory JDM rear muffler. Stainless Steel construction with twin stacked pipes, angle cut tips. Includes clamp and hangers. Interior tube diameters : 1x63mm 2. 5 entry and 2x50mm 2 internal and exits. Entry pipe = 63mm 2. 5 diameter (with 67mm sleeve) Box = 380mm long and 150mm diameter Exit pipes = 2x50mm 2 internal diameters Exit pipe max. lengths = 180mm long (top) and 150mm (lower) on the top of each tube. Total length = 660mm (front of entry