1:48 metal exhausts for aircraft models replace blanked-off styrene mouldings with manifolds whose stubs are genuinely open and thin-walled. The choice runs to exhausts for the de Havilland Mosquito B Mk.IV, late-series LaGG-3 and the Dornier Do 215B. Each manifold is shaped for one aircraft sub-variant, so it seats without lengthy fitting, and after staining it passes for scorched steel.
At 1:48 the exhausts sit immediately beside the cockpit, exactly where the eye lands first. Mosquito and other airframes to put them on are in 1:48 aircraft model kits, the remaining sizes in metal aircraft exhausts. For rust and soot worked into the metal texture, reach for weathering pigments.