the JDM R may look like this

B18C
2*****

so when he gives u the engine code for a revs check or whatever, it will look like b18c2... so dont get confused,

otherwise it will look likie thsi for a vtir

B18C2
100***

and C7 for aus spec dc2r

also the vin number

JHMDC231** should be the start of the dc2r vin or something similar

the [DC2] is model make [3] number of doors or soemthing and the [1] will signify type R... [8] instead of [1] will be vtir,