It does nothing for performance and the oem will be more than adequate fot the job.
I'd say send your money elsewhere but of course its your shout.
I prefer dumpless
The work they have done isn't exactly your normal off the shelf parts.
Its a garage sponsored car so work is done when they are free.
Its getting a full strip down in the chassis department and powder coated.Then new Whiteline and Superpro bushes to replace all the old ones to rebuild the chassis from the ground up.
And maybe even fit some Ohlins
Had a great time and was sure good to catch up with Colin, Chris , RS Grant , Alistar Steve.W and many more that i might have forgotten.
Can't wait to get my car back and give it some down the strip