As above, that's the common fail area for the OEM system, and it most likely will fail on MOT emissions as a result of it... We have a range of new options, if you wanted a good replacement then the Cobra Sport system we do would fit the bill at £425.00... Cobra exhaust system can be seen here - http://www.350z-uk.com/topic/63096-cobra-sports-exhaust-from-cougar-store/ . Good work with the wash though, Zed looks great...