Smiling Border Collie Dog Head Isolated on Transparent Background Zstory Stainless Exhaust System Classic Complete 240Z 260Z 280Z. Zstory complete exhaust system for 1970 78 240Z, 260Z and 280Z. Kit includes 2 into 1 stock style downpipe that attaches to the stock exhaust manifold. 2. 5" SS tubing back to a Classic muffler which all mounts in the stock location. Easy bolt togther (no welding required) system using V band clamps and T bolt clamps. Includes clamps and hangers. * Add the 2+2 extension pipe for using this system on a 280Z 2+2.