they are different emissions and different amount of metals inside will also give codes for cat not doing enough, and will fail the prescribed outputs for mot, below link cheap new cats use them al the timeHas anyone done this swap? Just curious to the effects it may have on the engine/performance and such and whether its a good idea or not.
Appreciate all replies!
Just had it in the workshop, the current one at the Flexi joint has split cause it to leak exhaust gases, rather than spend money on a replacement I was just curious as to whether swapping it would improve or decrease the performance, emissions, exhaust flow, etc... I wouldn't be swapping the catalytic converter as that part is fine. Just from where the manifold and CAT come down and join onto the rest of the exhaust system.why would you want to fit an exhaust from a smaller capacity car?