MARVELOUS S1. Compatible with both gasoline and hybrid models. I used it on a gasoline Z. It's a muffler manufacturer's product, so the build quality is excellent. The securing bolts are size 15, likely for theft prevention, and are not included in standard toolboxes. I'll include a wrench I bought separately as a bonus. I'll also include stickers as a bonus. Unlike cheap products, it's made of thick stainless steel with solid welding. The bolts and nuts are thick enough that the threads won't strip even if tightened strongly, so the strength is outstanding, and there's almost no risk of it falling off. This is very important. You'll regret buying a cheap one. I know because I did. It also naturally tightens up the rear of the Yaris Cross, which is a weak point.