The new exhaust is a standard Rotax-style muffler mounted just in front of the nose-leg. The larger volume will mean that it will run cooler and not be so close to the fibreglass lower cowling.
Moving the muffler back means that the radiator is now vertically-mounted on the right side of the engine bay.
Moving the muffler back means that the radiator is now vertically-mounted on the right side of the engine bay.