Thread: Exhaust System Bore Diameters.........
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Old 08-10-14, 08:38 AM   #4
Mark S
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exhausts are measured od.

zs180 is 2.25" stock

scorpion 2" 180
janspeed 2.25" 180
piper 2.5" 180

The 120 I had for a short time looked 2" or even less, but it had replacement exhaust parts which may have been a different bore, but in was minute!
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