Original part from renault. £18 each. only need 1
they dont need to be heated to fit, just carefully tap it all the way round and take your time, they are very soft and crack easily.
Thanks for this infoyes you have to heat the ring with a blow torch or something like that so that it can be fitted. It goes red hot and expands then when its in place and starts to cool down it ends up being a tight fit. Ive changed both my ABS rings within the last 6 months as the old ones both had hairline cracks in 2 or 3 places. I didnt however do it myself as I would prob balls it up.. my dads mate a mechanic did it for me for a fiver each!