Yeah forge do a silent one, Its the 007 re circ valve.
You will still get a slight whoosh but its not chavvy, nothing like an rs turbo.
I run the split r, Makes a nice sound. Nothing too loud but just right for me IMO.
If you want quieter get the 007 valve from forge. Shame, ive just sold one of them for £40. Only done 3000 miles as well.