A replacement Trifoam® Filter Unit for the Racing Line R600 Intake. This Trifoam® option is the ultimate filter unit that will deliver optimum power gains. It can be fitted into any Racing Line R600 Intake (including those previously fitted with a Cotton filter unit). This Trifoam® Filter replacement 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. The choice of Trifoam® filter material gives you the highest airflow for the best possible power for more of the time. However, as a high performance part, regular maintenance or replacement is essential to keep it in peak condition using the Racing Line Filter Refresh Kit to clean and reoil it, or ideally replacement of this filter unit every 10,000 miles. With the option of either this Trifoam® R600 filter or the Pleated Cotton option, the choice is yours – note that the alternative 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. Note: fitment is only for Racing Line R600 Air Intakes.