The legendary Puch Simonini expansion chamber. Looks great on just about an Puch moped out there. They even show up on other bikes like Tomos, and Derbi. This is the high water mark for moped parts.
Pairs really well with a 24 Mikuni, and an 75cc Puch kit. Requires a little cutting and welding to work on the angle ported Gila and Metra, but totally worth it! Because of the girth of this exhaust, you never know exactly about the fitment issues. It might come close to your shocks, and most definitely your pedals won't work out of the box.
You can get it though, and when you do, you will be blown away by the Puch Simonini!
Made in Italy!