Seabee Posted December 17, 2010 Report Share Posted December 17, 2010 AIRAID now has 2 different direct OE replacement air filters for the GT500. Part # 860-399 - Standard AIRAID Filter @ $69.99 Part # 861-399 - SynthaMax (non-Oiled) filter @ $79.99 Other than that the standard filter uses an oil to help trap contaminents i.e. K&N, Greenfilter. Is that the only difference and what does it really mean? If at $79.99 is a throw away filter, then it still is cheeper that the Motorcraft Ford Racing Stock filter at a list $ of $127.84 and the dealer @ $115.06. Link to comment Share on other sites More sharing options...
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