flow of exhaust gasses trough cat

[Adam-o]

I was just wondering is there any difference if you put the cat the other way around will it still do the same job?

 

[Alic01]

Normally you have to install them the right way round as the reactions have to happen in the right order chemically. A lot of them arent symmetrical so they cant be installed wrong.

Performance wise i dont think it makes a difference but emissions wise it will.

 

[Andyman]

As above. On a 172 / 182 the flange types wouldn't mate up being the wrong way round

 

[hollandcup]

Why bother?

As said though it just wouldnt work.

 

[Adam-o]

the thing is I've got a 182 mani and a 172 exhaust, so need to make tha cat fit. thats why I'm wondering if it makes any difference which way i put it back on
ps. i need to cut both flanges off

 

[Kam.]

it wont help. Standard cats are crap end of, a 182 sports cat would be a better bet..

 

[st3ve]

the thing is I've got a 182 mani and a 172 exhaust, so need to make tha cat fit. thats why I'm wondering if it makes any difference which way i put it back on
ps. i need to cut both flanges off

Just get one of those 182 > 172 system decats.

 

[scotty2hotty81]

I've heard it all now lol, bin it and fit a de cat!