^well they do the same thing custom said they just use the b16 case and add the pm6 guts to it from crx si distibutor...even know its "brand new"does not mean its good like i said i bought a NEW one from this distibutor king and it turned out not to work he would not take it back so i just went to autozone bought the crx si 1 cut the leg off i did not have any problem tho with timing it or advancing it still had room