The early cars had a small, restrictive exhaust fitted. The later cars, with a nod to the popular Japanese market had a modified version of the heavy Exige S system to help meet strict db limits. Neither is ideal for a track-focused, (allegedly) lightweight car.
For the early cars, I can fit the big 8"dia x 24" GT3 system from the Exige S. It has a central in/out on the end-caps.
For the later cars, with the number-plate holder and different diffuser, I need to fit the off-set GT3 to clear those parts.
Both systems are the Re-Pack design as these cars are very hard on the silencer packing.