MANIFOLD TWIN INLET HS4/6

Cast alloy type, Fits either twin HS4 or HS6.(requires modification to fit HS6.2 extra studs per carb) 

This intake manifold for twin SUs has been carefully produced to minimize cross-port-flow interference caused by the balance tube and has generous radii in all the right places.

Further blending can be done if required, but leave a ground finish to promote fuel atomization.