Derbi Variant Biturbo Exhaust locking in pretty good shape but

in pretty good shape but not pristine

Spigot mount makes it super simple to mount to most intakes with a piece of hose and 2 clamps

Malossi reed valve for tons of bikes

every variant of the horizontal Morini moped engine family

5mm cylinder head for Yamaha DT50 and RD50

Derbi Variant Biturbo Exhaust locking in pretty good shape butClassic Biturbo for flat reed powered Variants. This pipe is from our vintage collection. This pipe is new old stock but expect minor blemishes from riding the shelf for so many years. Get it while you still can! Inner diameter of the header is 24mm. The largest portion of the pipes chamber reaches around 90mm.