All Tecinox exhausts are constructed from high quality 304L and 316 stainless steel. The high quality metals are guaranteed to retain thier flexibility during expansion and contraction of the exhaust. During manufacture, oxygen is removed from within the tube by an inert gas before sealing, leaving smooth, clean, strong welds. Upto 14mm steel flanges ensure a secure fit without the risk of distortion or leakage. The best quality, sound and thermal absorption wool is used, meaning the materials undergo little alteration compared to conventional products. All tecinox systems will fit on original vehicle mounts and exhaust systems.