After testing a variety of shapes and pipe diameters they found the optimum tuning point for the best performance balance. This design will extract the full capabilities from the EVO X 4B11 engine. The design also retains the original layout to help with the ease of installation and compatibility for other exhaust parts.
The kit comes complete with everything that you need to directly bolt it onto your car. No need to hunt for those little bits that are required to complete the installation.
The size, finish and quality are all there as you'd expect from a Tomei product.