VOG 260 Exhaust Emissions Tube PAIR Exhaust Emissions Tube for VOG 260 BN169MM Engines commonly found in Linhai 250/260/300 Scooters and many other makes and models. PAIR is an acronym for Pulsed Secondary Air Injection System. It is an emissions control system used to lower HC and CO emissions. It works by allowing air into the exhaust flow.Some of the models and brands using this engine include the Aprilia Leonardo 250, Aprilia Leonardo 300, Benelli Velvet 250, CF Moto V3/V5, Diamo Turista, Italjet Jupiter 250, JCL, VOG 260 , Linhai Aeolus, Linhai ATV 260, Linhai Tank 260, Tank Touring 250DE, Malaguti Madison 250, Malaguti Password 250, MBK Kilibre 300, MBK Skyliner 250, Renault Kouranos 250, Roketa MC-54 250B, Xingyue VOG 260, Yamaha Majesty 250 (mod. 1999), Yamaha Majesty 250 and many more. Bolt Hole Spacing: 34mm