Based upon the Nissan factory racing manifold/ header, which was originally conceived to fit right-hand-drive JDM competition S30s and available through their Nissan Sports catalogue. Zstory has since redesigned and improved it to fit perfectly upon all* LH and RH drive S30s.
Zstory has continually strived to evolve the manifold to fulfill modern-day customer demands and had made it 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, it allows for matched porting with improved-flow cylinder heads.
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 merging 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 to the exhaust line for leak-free and easy mounting/disassembly.
The manifold’s primary pipes have 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!
*admission systems are expected to be improved too and the current manifold is incompatible with late 240Z and all 260Z ‘flat-top’ carburettors. I am currently looking at modifying the design to accept these carbs IF there’ll be no performance compromise. The alternative today is either to fit the Race-Sport manifold or change to 240Z SUs / triples.
**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!