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Discussion Starter · #1 ·

Just got my second E60 M5.
While my other 1 was on bmw motorplan i did not do much to mod it.
The new 1 is off warranty.

I am planning to get a custom header and exhaust made up here in South Africa.
Buying and shipping a unit is a bit expensive i think.
Also i will be running no cats as they're not compulsory here.

Please can anyone assist by letting me know:

1. Primary tube diameter on headers, aftermarket (dinan/agency power/rpi/evosport)

2. Exhaust tube diameter, aftermarket sizes.

Please assist.

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