What catalytic converter on a Honda SC?

Hi

Failing Dutch MOT here. Had the car dyno’d yesterday and that all looked good. But not what is coming out at the end. Possibly the CAT is not doing enough or nothing. What catalytic converter is mostly used? A regular Honda one or…?

//René

A 300 cell sports cat is the way to go.

Thx, had a choice between 400 and 200 and was recommended a 200 cells due to my 300Hp set-up. Worked like a dream and MOT passed.