Question shape of Pinasco Exhaust

Shape of Pinasco exhaust no.40308100 ( no.40308300 (

Are diffent right ?? fitting point

I just fitting in my PX125 CATA ---> I really need shape of 40308100
Now i confuse ><
I found some vespa px fitting point same in art no.4038300(it can fit on PX but different fitting point right ?)

I think they're buy wrong part no. or Now **Pinasco make it only shape in art no.40308300. 

Thank you for answer.