for questions and answers about alternative power transplants on the T25, GTi, Porsche,Subaru etc, this is the place. You must register to post but anyone can read.
retainer in the parts catalogue
068 130 147 J is the part number for a T3/T25
other vehicle installations may differ
Euro 5 for a new one, if Brickwerks don't stock it they can order you one from VWClassicparts just ask nicely sales@brickwerks.co.uk