This two piece intake manifold from offers a great alternative for the usually very expensive straight intake manifolds from renowned manufacturers. Comes with intake rubber in two sizes (24 and 32mm).

The manifolds are fully rotatable through 360° so as the carburettor can be mounted to face any direction.
Will accept carbs from 17.5mm to 28mm

Note: Is not likely to fit with standard air boxes, you'll need to use an aftermarket air filter.