Tecnigas GP4 Exhaust for 4-Stroke Piaggio Scooters

DESCRIPTION: Tecnigas GP4 Exhaust for scooters with 50cc 4-stroke, 2 valve head Piaggio engines.The Tecnigas GP4 is a sporty nickel plated exhaust that improves performance over the stock exhaust, all while being quiet and fairly light weight. Fits the following models with 4-stroke Piaggio 50cc engines with 2 valve heads: Aprilia: Scarabeo , Sport City One Derbi: Atlantis, Boulevard Piaggio: Fly, Liberty Vespa: LX50, Primavera, Modern S Head Pipe Bolt Hole Spacing: 40mm Head Pipe Inner Diameter: 18mm Includes Mounting Hardware and Instructional Booklet Piaggio, Vespa