... of a recirculating DV for an S1 RSt?

not sure i will like "artic" noises, but would like to retain the safety margin of a DV.

seems to be some listed for cossy etc. but not for RSt.

 

Makes no difference what car its for, as long as you mess with the plumbing to make the outlet join back to the filter-turbo pipe its done. Same on any car.

Only listed for some cars as them cars come with recirc ones as std