Injector/Carb to Engine Inlet Manifold Rubbers. 
 
FJ: Inlet rubbers that fit between the Carb bank and the engine.
Available singly at £25 each (Cylinder 1 &2 are the same as are cyl 3&4) or as a set.
Useful for those with FJ's and XJR's wanting to free up the power on their bikes. ( This may require extra mods)
 
FJR: Set of Four Inlet rubbers that fit between the injector bank and the engine. Ideal if your bike is restricted (French, Swiss) as fitting these will allow the full power to be unleashed. (With no other modifications).