Circular race-cat v.s. ground clearance?

[#84]

Hi,

I have been in touch with Ecocat, maybe world leader in metallic substrates - and supplier to Alfa Romeo . They have supplied the original parallell catalysts, under the previous name Kemira Metalcat, and today they have a range of racing catalysts as can be seen in the attached catalogue. The smallest one, 112 mm diameter, have I been recommended and it is no problem to fit it since one of the original catalysts are 7x13 in cross section.

So, I would gain 1 cm on each side, but I would loose 3-4 cm in ground clearance, therefore I wonder if anyone in this forum have fitted a circular catalyst of similar size and if that has casued a lot of problems or not? I am a bit worried since ground clearance isn't really my car's best discipline.