Hi people, looking for some advice here as the time has come to fit a catalytic convertor to my 2004 S as with the De-cat fuel economy is pretty bad! thinking of buying an ebay effort...

http://www.ebay.co.uk/itm/HONDA-S200...item1e6b441138

http://www.ebay.co.uk/itm/REACT-Cata...item46000cd58f

...has anyone had any experience with these cats? are there any noticeable differences like loss of power or something, lumpy idle? cheapest one comes with a 2 year warranty, very tempting at these prices! feedback greatly appreciated!

thanks

Kev