Went to change my fuel filter yesterdayon the 99, got one from Azone $32 bucs. The damn thing wouldn't screw in, took it back, got another one, same thing, threads are a little too large, would only screw in about a thread and a half They only carry the Duralast. Went to NAPA and got the 23818 for $23, they also have the 3818 for $45, sure couldn't see any difference between them.