Entirely (weld beads, flanges etc) made from 304 stainless steel, tig welded and polished. 34.5" diag. from front flange to rear flange. For Volvos with EGR (Exhaust Gas Recirculation) system. Does not have an oxygen (O2) sensor port. Floating Flange which is precision plasma cut from solid stainless steel. This will be the last header pipe your Volvo 240 will ever need. Covered with lifetime warranty. Exact copies from the original Volvo only made in stainless steel, mandrel bent (filled with sand to prevent collapsing and corked at the ends to keep the sand in place). Fits 240 244 245 sedan or station wagon from 1980 through 1993.