These high quality intake manifolds for the Triumph Bonneville's from 1963-1968 allows fitment of either the Amal or Mikuni VM carburetors.  The manifolds are two fine threaded aluminum CNC machined manifolds with 20 threads per inch.  The manifold kit includes two thread in manifolds, two rubber hose adapters, and four clamps.  Fits 1963-1968 Triumph Bonneville's with fine threaded (20TPI) manifolds.


Intake manifolds have a 38mm OD x 33mm ID at the carb end.  The ID tapers down to 29mm at the engine side.  Overall length is 42mm.  The threaded width is 25mm and the smooth rubber boot width is 18mm.  The rubber hose adapters are approximately 43-44mm in length and 5mm thick.