Reproduction of original Downton/ BMC Special Tuning Cooper manifold.Ideal for engines up to 1000cc & mild tuned 1275cc engines.Good for low down power. Use 1 3/4" systems and pictured L71 Adapter when fitting a maniflow 1 3/4" systems (Freeflow when fitted to a RC40,can be puchased without adapter L71(see fitting kits & gaskets ) .