Schiedmann got back to me, said pipe diameter is 50mm. Also Emory confirm this as well. So too small for the 4.8is. Damn it!

My only option is Supersprint that is considered affordable compared to some other brands.

But still want a matching x-pipe (just to satisfy my OCD) and Supersprint only offers a center muffler that looks like the oem unit but maybe a smaller resonator. No sound clips of the setup.

4.8is is 60mm (measured my own)
4.6is is 55mm (measured my own)
4.4 must be 50mm (assuming)


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2005 Imola 4.8iS