i just bought a prodrive highflo cat for my03 sti version8. i also have a blitz nur spec-r cat back system already fitted and no other mods.
does anyone know if this cat will bolt straight on with no other mod like remap necessary? as i know the ppp includes remap.
any help appreciated......cheers.

 

cat will bolt straight on ,you need to get a new gasket though.
you may need remap as the down pipe and exhaust may cause over boost and the cell light may come on also

 

It will bolt straight on no problems.
You can try it without a remap, but if you get a CEL it will be CEL code P0420 -Catalyst System Efficiency Below Threshold. This is caused by the gasses flowing quicker through the sports cat I believe and can be Ecutek mapped out. Also have a search for the symptoms of overboost in case you experience anything that feels the same.

This is what 'can' be experienced. It may be absolutely fine of course.

 

cheers guys. much appreciated,