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Polini muffler for Aprilia Sr 94,95 Sr h2o for race 4. Polini code: 200.0297. The Polini FOR RACE 4 exhaust systems have all been revised to always be at step with the times. The project is specific for the latest generation of scooter engines. The line of expansion, increasingly captivating, has changed in its entirety very close to the Big Evolution...