Did a search but no real joy, 've bought a 3 inch downpipe and decat so I need a lambda spacer for the rear lambda to keep it out of the gas flow...just wondered if they work or not? Seem to get mixed reviews elsewhere. Also worth noting the bottom of the spacer has a hole in so some gases will come through. Also, my S3 has a stage 1 custom map so could I get it tweaked to accommodate the decat? This is the item in question. http://item.mobileweb.ebay.co.uk/viewitem?sbk=1&nav=SEARCH&itemId=251317571511 Thanks in advance for your advise!