MALTINGS TRADE CLUB MEMBERS RECEIVE FURTHER DISCOUNTS CALL FOR DETAILS!!!!!!!!!! TO BECOME A MALTINGS OFF ROAD TRADE CLUB MEMBER GIVE US A CALL OR VISIT OUR WEBSITE. RANGE ROVER SPORT 2.7 TDV6 DE CAT REMOVAL PERFORMANCE FRONT PIPE AND GASKET. The Terrafirma range of de-cat down pipes and silencer replacement pipes are intended to improve the performance and economy of diesel Land Rovers. Save a fortune when your catalytic converter fails by fitting a Terrafirma de-cat down pipe and enhance the performance and economy by de restricting the exhaust system. UK MOT regulations suggest a maximum weight limit, above which a catalytic converter is not required. This permits replacement exhaust systems to be fitted. These pipes fit directly to the original system and require no modification.