When my MOT comes around I will need to re-fit the cat, can the cat be fitted backwards or will it only go on one way, sorry if this sounds a daft question but I haven’t even looked at the cat since buying the car, it still sits in a sealed box in my loft.
Thanks for your advice.

Dont worry it will only fit one way

It will only fit the one way, top tip, if you’ve not allready done it, remove the studs from the cat , and when refitting it use bolts, makes the job much easier.