if its for your 182 dont bother
the cat on them are already as good as you will get!
so it's decat or std
(172's cats are not and benfit from sports cats)
Not strictly true, the standard cat on the 182 clio may be 200 cells, the same as say a Janspeed sports cat but thats about it.
The actual cat length on the original 182 cats is twice the length compared to the Janspeed, it also weighs some three to four times as much.
Even though both claim to be 200 cells the cell structure on the Janspeed is larger.
The trouble with the Janspeed sports cat and the reason people say there is little or no change in performance when fitted is because of the terrible design of the piping diameter where it connects to the rest of the system. And then to make matters worse they then added the senor plug there.
To get round this problem I recently had my old Janspeed sports cat re-manufactured at Mark Fish Motorsport. Performance wise I can't tell any difference from my previous GDI de-cat pipe, with only the noise being a wee bit quieter.
Although not really a cheap option. But now I'm 100% legal again!