Volvo 230 Redblock 2 Valve Exhaust Manifold Flange Volvo 230 Redblock 2 Valve Exhaust Manifold Flange Select material options. Neatly deburred and ready to ship. Build your own exhaust headers/extractors or turbo manifold with this laser cut exhaust flange. Made in Australia. MSRP: Was: Now: $75.24 - $151.32 Choose Options