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Actually, TWM was bought out by Borla and is now known as Borla Induction. They do make Horn Screens for 58 mm horns. They also state that they are screens for keeping out debris such as stones and they are not not filters. I use a set of ITG filters which were very expensive, required modification to the horns and the hood opening and came only with a base plate that had to be cut out to fit. basically, they are universal filters. But maybe that is one reason I haven't had ANY engine problems in 8 years. Good luck to you!