Don’t over tighten your JR Filter!
We have had a spate of people ignoring the Fitting Instructions when fitting their JR Filters, especially the super efficient JR Cone filter, that works so well on the Seat Leons etc.
If you over tighten the filter’s clamp (which is easily diagnosed, as the clamp will dig into the rubber), then the filter will split and become un-useable. You only need to screw the clamp to a certain point to make the soft rubber create a good airtight seal. If the rubber starts to bulge, you’ve gone too far – back-off!