Anyone know whether I can run a 3" downpipe decat bolted straight on without being mapped? Obv mapping in future when funds allow,just until, it will just cause CEL light ? No limp home mode or anything? Thanks

No just a cel light. You could try an O2 spacer which may keep the cel off.

I run a 3" decat and have no map yet.cel light comes and goes even with a lambda spacer fitted.

Goes better and better mpg !

For me personally it too loud combined with a Milltek.

Mines going to be on standard system so shouldn't be to loud, I'm after some more sound though! And bit more pull from low down!

Mine pulls hard from low rpm but pulls noticeably more above 4k on stock software.

Can't wait to map it though