Maicson Race Intake Manifold for 32mm and 40mm Throttle Body UpgradeThe Maicson Race Intake Manifold is Designed for the Performance Upgrade Throttle Body that Maicson Ecu Tuning LTD Build. This Intake Manifold will double up your Air Fuel mixture in to your engine. Fits on Vespa GTS 250 GTS300 300HPE Engines from Vespa and Piaggio. NOTE: Special Designed Race intake Manifold also available for the Vespa GTS 125 ( Cylinder head INLET + OUTLET have to be Ported and flowed for Optimal Performance) Fits on : Malossi V4