Downton have also modified Austin and Morris Coopers with great success to easily exceed 100 m.p.h. For those people who do not wish to go to the lengths of this full conversion, which is given later, Downton produce a simpler set up which gives vastly improved performance together with smoother, more flexible operation. The 0 to 60 aceeleration time is reduced to about 13 seconds, and the maximum speed increased to at least 95 m.p.h The parts fitted are as follows. Modified Cylinder head with reshaped ports and combustion chambers, raised compression and polished. Twin H4 S.U. Carburettors and overflow pipes.
Special exhaust manifolds.
Set of special gaskets. Fitting, including testing. Th e full Mini Cooper road conversion consists of the following. Exchange modified cylinder head. New sparking plugs and gaskets.