Stock and aftermarket exhaust diameters?

[jon volk]

Been looking around but havent found any solid numbers on what diameter the stock exhaust piping or any of the aftermarket exhuast piping sizes for an i motored e30. Anyone happen to know off the top of their head what the diameters of the two pipes are stock or aftermarket?

[T.Dot E30]

1.75" = 44.45mm. Stock is 45mm.

[jon volk]

thanks :) that sure beat crawling under the car to measure it tonight.