Any review of Vespa exhaust - Racing exhaust LEOVINCE "Vintage" for Vespa GTS 125-300 i.e./GTV 250 i.e.?

I'm just thinking of buying one, but haven't heard anything about how it works in practice?

Anyone happy or disappointed? Does fitting it takes a lots of time? Does it have proper instruction of installation?

Thanks for reply.

I have this one on my GTS 125 ie.

Easy install, it was just a bit hard to get off the original thanks to one screw that didn't want to be unscrewed.

Love the looks and the sound!

See this forum for images and a video:

what about lambda.. there is any hole for it in this exhaust..?