Hi Flow Cats or De-Cat

[Alex]

Hey guys,

Can someone pls enlighten me about the benefits of one way over another? If my car has two pairs of cats, would it be better to remove second pair or remove all four and fit two hi flow ones?

Thanks.

 

[219]

This would probably get a better response in the 'engine' section ?

 

[Alps]

if your taking all 4 out then hi-flo to meet emissions, if only 2 then decat and leave the remaining two.

some people say even with 4 out they meet emissions...


have you got the dreaded rattling cats? had this on my c36 and i put in some hi-flo ones sourced from the states and fitted to custom pipework from hayward and scott.