Bare-Co B9991 Muffler Exhaust Compete with Muffler, Extension & Clamp
Pipe Size 46mm ID

Fits - Fiat 450, 480, 500, 540, 550, 600, 640, 650, 466, 566, 666, 766, 45-66, 55-66, 60-66, 65-66,
70-66, 80-66, 80-90