For those who know Max know that in his work he puts a constant commitment to continually renew himself to offer products that are always at the forefront using the best technologies on the market. The results are fantastic on the eye even before they are on the road. The performances are very high and all Vespa tuning enthusiasts can recognize them by now. All Max Quattrini cylinders, like this one and almost all the kits sold on our site, can only be used on the track and never on the road if not properly approved.This and other Quattrini cylinders for smallframe Vespa are: M1B D60 GTR (144cc aspirato al carter) M1B D56 GTR (125cc aspirato al carter) M1L D60 GTR (144cc lamellare al cilindro) M1L D56 GTR (125cc lamellare al cilindro) M1L D60 R53 (150cc lamellare al cilindro solo per carter Quattrini c1) M200 (200cc lamellare al cilindro solo per carter Quattrini c200) M1X (172cc valvolare per px) M1xl (172cc lamellare al cilindro) M3XC GTR (espansione M1-M1l) Our complete engines are also available. Some ready for delivery, others customizable by reservation with delivery in about 30 days.Other racing components and complete engines on request are: Falc, Malossi, Polini, Bfa and many others. For any request, do not hesitate to contact us by email at motorartretro@gmail.com or by phone / whatsapp at +393755789138.If you have questions about our products, direct assistance is always available via whatsapp or by call. We will be available to clarify any doubts.