Toyota Corolla AE86 Group A Exhaust manifold for catted cars AISI409 stainless

4-2-1 manifold, suitable for racing and street tuning for up to 180 bhp. Fits to both 16V and 20V cylinder heads. With flange connection for catalytic converter models. Lambda sensor connection with M18 thread is at the secondary collector and OEM style o2 sensor port + block-off plate if not used. Tube diameters (mm): 38 - 44.5 - 50.8