Hey,
Boring back story!
I bought my 350z a couple months ago, its a JDM and had a full cobra resonated system with their de-cat pipes. It has a spacer and the limiter removed as well. I can't find a HKS speed defender so i assume it has had an UpRev at some point ( Didn't come with much receipts ).
The de-cats had been removed for a new MOT when i bought it from a dealer (about 3 month ago), I haven't put them back on yet.
My question is, if i re-fit the de-cats will it need an remap again? and if it has been remapped with the decats is it bad that im running the cats at the moment?, is it bad for them and the system?
Cheers
Sorry in advance if wrong section / already been asked! I couldn't find anything when i searched that answered my exact situation!