51022 (EFRA 2122) - Polished pipe, with ring, 3 chambers, more torque. OUT OF PRODUCTION
51010 (EFRA 2015) - 3 Chamber polished tuned pipe with mounting ring for 3,5cc On-road engines. (EFRA/IFMAR legal). A more progessive tuned pipe with lower fuel consumption.
NOVAROSSI WORLD S.r.l. Via Europa, 20/A Monticelli Brusati (BS) Italy P.IVA - VAT: 02812810980