hi,
i've to change my OEM downpipe and i'm going for a sport cat one.
i've an aftermarket ECU, fuel pump, antilag, etc...car mapped 330bhp/330lbf
my question is: do i need to remap again when i fit the sport cat downpipe or can i drive without mapping?

cheers all

 

you did well getting 330 with your cat still in! I would say you will need another map once sports cat fitted as it will gain you a good few bhp!

 

Let me know how it goes with the sports cat.. I've been thinking about one in the future but you really notice a difference with a de-cat and if it's hardly noticeable with a spors cat I'd rather stick with the stock.