Thanx for the input Dave! As you say, welding a pipe in to replace the cat wouldn't be a problem, I've done similar before! I'm just a little concerned now about getting problems with the emmissions sensors and the warning light! My last 'Civic' wouldn't start in the cold 'cos of an engine warning light that strangely appeared as soon as I'd had the car chipped. (Luckily it's never cold in England!???! ) That's why I want to get as much info' as possible before I make any changes to this car! I want to avoid messing it up!