General What size exhaust pipe reducer 1.2 sport to Abarth back box?

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General What size exhaust pipe reducer 1.2 sport to Abarth back box?

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Apr 6, 2014
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Wanting to get all bits in place and am yet to receive my abarth back box but wondered if anyone knew what size reducer I would need to fit the Abarth back box to the 1.2 sport pipe so I can get one on order? I think the bore on the Abarth pipe is 63.5 but not 100% sure!!
Thank you in advance
 
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