made by cativa for the cativa reedvalve conversion cylinder kit.
1 short exhaust (low)
1 long exhaust (high)
300$ obo ea. shipped. (hand made!)
these made are for the south american brn flanges bolt spacing, will not work on your polini cylinder period.. i was told when i bought these there called low and high exhaust pipes aka street pipes! buy these to run on your moped!