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Alex,
Yes, those are intake mufflers. Some country's have noise restriction laws for road legal driving with dual carbs... They are said to make almost no difference in power or maybe only 3 or 4 hp with 175hp engines. Big bore engines can make a lot of intake noise which gets very tiring with long trips and tese work very well.
Our track at Zandvoort only allows 90 dB noise during normal hours, so then you must have s/thing like this.
They cost a fortune compared to a set of ' stock' K&N filters though: around € 650-700. Today that's about $ 750 ! They look clean, but I would never buy them for looks only...
Walter
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