[Alexus82]

Hi,

there is a nasty change coming to legislation about catalytic converters in my country (Finland).

So I have to change from de- cat to cat-back downpipe. With my mods car currelty makes 560 hp (PS2 turbo, bigger cooler, Dorch stage 2 HPFP, Stage2 LPFP etc.).

My question is that do I need a remap due to this "de- cat to cat-back" change?

[///MPhatic]

Most tunes that I've seen differentiate between the stock cat, a 200 cell cat, and catless, so I'd bet that you need a tune based on the cat you're adding. The rest of the exhaust makes no difference.