Wolfy

Does anyone know anything about this brand or product? Considering it for my LS. Thanks
https://page.auctions.yahoo.co.jp/jp/auction/l1108479488

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BB9

Not familiar with it first hand but I'm looking at the pictures on the website and it feels like something rather nothing special. That kind of welding that you can see around the flanges and on the muffler body combined with $300 price does not promise particularly high end product. I might be wrong though.