Boxster 3.2S Race Exhaust recommendation required

[London GT3]

I am racing a 2004 986 3.2 Boxster S in CSCC series this year.

The stock exhaust is quite heavy. Does anyone have a recommendation for a race exhaust. The engine is stock. I am looking to save weight and maximise any performance gains if possible.

Any experience of Fabspeed exhausts?

Thanks