The Zstory exhaust manifold has evolved from a prolific header (NLA), widely praised and fitted to many S30s and S130s alike. Vastly improved using the well-known Zstory ‘thick’ flange which fits with all head types, wider diameter primary pies with high-quality welding and longer secondary tubing.
This 280ZX manifold has been optimized for performance and is designed to fit both 2x seater and 2+2 models, made from 201 (austenitic) 1.25mm stainless-steel for its own protection and longevity, the primary pipes have a 1 5/8’’ (40mm) internal diameter leading to twin secondary pipes of 45mm (int. diameter) secured via twin T-bolt clamps.
Zstory has chosen its’ current pipe diameters to be the optimum for the majority of (normally-aspirated) engine applications ; big enough to exit the gases quickly and easily at high engine revolutions, small enough to give optimum back-pressure and increase low-rev torque.
Please don’t hesitate to contact me for advice