The Novarossi 41031 - Polished conical short header set 2 rings Ø18/15mm. NEW 2014
Shorter exhaust: gives less acceleration, but an increased topspeed.
Longer exhaust: gives more acceleration, but reduced top speed.
Conical exhaust: top speed higher, higher acceleration and higher fuel consumption.
Cylindrical exhaust: top speed lower and lower fuel consumption.