Tested many, oem is no good, non exsistant non oilled k&n one off nascar filter fits with old light stand and a coffee mug lol...freebie no joke, gold ducktape for easier replacement...handed down at a closing nascar booth...o yeah ive read all jag forums lol just cause then car came to me...free 92' xj6, xj40, 4.0L...rally jaguar project now except its hotter here in the desert and theres rocks...Air filter mod very quiet and very load but controlling..