For the guarantee conditions, the exhaust manifold, downpipe and repair pipe must be verifiably installed by a specialist workshop using the assembly parts included in the scope of delivery. The invoice from the specialist workshop serves as proof of the installation date. The geographical scope of the warranty claim is Germany, whereby the period for calculating the warranty period begins from the date of installation. The prerequisite for claiming the warranty service is that the guarantor (manufacturer) is given the opportunity to examine the warranty case in detail (e.g. by sending in the goods). It is important to ensure that any damage to the goods during transport to the manufacturer is prevented by secure packaging. A copy of the invoice must be enclosed with the shipment of goods.