God bless you all.

I'am from Croatia.
English it's not my language but i hope you understud me.
In my property it's one "alfa trofeo 145" 1.4(1.3) boxer engines, year
1996.
This small car weight 1140kg and have only 90hp which is aprox.
13kg/hp.
The car have catalytic converter, and I hear that piece of sheat teake
for me 20% horse power, i suppose cat choke exhaust gas.
If I remove cat.converter (i have only 1 lambda senzor before cat)
than i have back my loss horse power and than car have 90×1.2=108hp.
My question it's that true & any sugestion.

Thanks!

(I'am new member on this great groups & groups hr.rec.automobili)