Unknown 4-Bolt 34mm Bore Cylinder Head For 1/5 RC Cars

Unknown 4-Bolt 34mm Bore Cylinder Head For 1/5 RC Cars

Don't know the manufacturer as it's not marked. 34mm bore. Oddly it only has an exhaust exit, nothing for air. Cheap to clear.

New, but has been loose in a box for quite a while so has a few marks.