Designed to fit with all three Zstory exhaust manifolds*, the line is made from 201 (austenitic) 1.25mm stainless-steel for its own protection and longevity, has a diameter of 63mm (2.5’’) and is composed of three parts (excluding the rear silencer/muffler).
Fitting to the manifold’s* Y-pipe collector is the centre silencer connecting to a short intermediate pipe fitting through the inverted ‘U’ in the differentiel front support before the ‘S’ pipe which passes around the rear of the differentiel and into the rear silencer/muffler.
Zstory kits are designed to fit no lower than the floor reinforcement rails and both 2x seater and 2+2 Zs.
Along the transmission tunnel, the line uses V-band clamp fittings for leak-free and quick/simple mounting/disassembly and at the ‘S’-pipe, a T-bolt clamp to allow the maximum adjustment flexibility.
The line is supplied with all necessary fittings ; clamps, straps, gaskets and nuts/bolts (where applicable) and Zstory holds stocks of fittings, gaskets or pipework in case of later street/road /competition damage or loss.
Depending upon its design and purpose, any exhaust system compromises something to give something else – no exhaust is ideal for all applications and at different engine speeds, different sized exhaust tubes are better than others… !
Two, small diameter pipes such as found on the S20 engine applications are best suited to a small capacity, high-revving engine to help generate low-end torque without penalising top-end power.
Engines with larger capacities have less need of extra low-down torque and strokers almost none, having ample quantities merely from their larger size.
*a new development in 2019 will see the production of a down-pipe to allow the Zstory exhaust line be fitted to an OEM exhaust manifold for those who wish to have a stainless-steel exhaust without removing their admission system and changing the OEM manifold.
**this silencer will evolve in late 2018 to become 127mm in diameter as the Zstory exhaust continues to adapt to ever-increasing noise limits.
Don’t forget to look at the rear silencer pages to choose yours
and please don’t hesitate to contact me for advice.