Based upon the North American ‘NISMO’ header, which was originally conceived to fit left-hand-drive* S30s in the absence of suitable parts from Japan (RHD and S20 powered cars), Zstory has redesigned and improved it to fit all left-hand drive* models.
Zstory has continually strived to evolve the manifold to fulfill modern-day customer demands ; it is made from 201 (austenitic)1.25mm stainless-steel for its own protection and longevity, with less pipe welds and a thicker flange specifically trimmed to fit all heads and blocks.
The 6-2 configuration is generally accepted as being the most suitable for the widest range of engine applications. Zstory has further developed that conception with the 2-1 joining as far back as possible before the first silencer.
The Y-pipe (2-1) collector has a built-in lambda sensor plug and bung to allow accurate engine testing and real-time surveillance and finishes with a V-band clamp fitting for leak-free and easy mounting/disassembly.
The manifold itself has equal-length primary pipes with an internal diameter of 40mm. It is important to stress the internal diameter of the pipes because the earlier, cast-iron versions were measured externally and had thicker piping!
*this manifold is therefore won suitable for LH and RH drive S30s.
**read more of that later in the specific section on this website!
I recommend that you consult with me before deciding – what are your expectations and why I have 3x versions to choose from!