I am getting my parts together before a remap. My question is I am fittng a decat down pipe and a prodrive back box will keeping the original second cat effect the power much when remapping. I dont want the exhaust to loud, the car is a 1999 uk 2000 wagon

Thanks Neil

 

Its not a cat, well I say that, my old MY98 and MY00 STi had a resonator in the centre section.......

 

Uk cars have a second cat in the centre pipe, I brought mine with double decat and a scorpion exhaust (pretty much the same as the prodrive) and mine was quiet, could hear the rumble under load and at higher revs. I found mine too quiet and went for a louder exhaust,