A replacement Pleated Cotton Filter Unit for the Racing Line R600 Intake. This Cotton Filter option is a robust 'fit and forget' unit that will deliver great power gains, plus last for years. It can be fitted into any Racing Line R600 Intake (including those previously fitted with a Trifoam® filter unit). This replacement Pleated Cotton Filter Unit can be fitted in any R600 Intake (other than gen 3B 'MAF' engines which require part number VWR12G7R602). This is a simple straight replacement filter unit, ready to drop into any existing R600 intake. This Pleated Cotton Filter option is a robust 'fit and forget' unit that will not only give great initial power output but requires no maintenance to last you for many years. With the option of either this Pleated Cotton R600 filter or the Trifoam® option, the choice is yours. Note: fitment is only for Racing Line R600 Air Intakes.