Probably cash discount. Did you end up with a horid bigas reg or an omvl one?
There is 100% no need for flashlube one these engines tbh. having done over 150'000 in one engine with no wear on the valves train I think that goes to prove it.
If you are prepared to self fit then it does save some extra cash for you. But that is only any good if you are mechanicaly capable.
Kit prices do depend on what model car it is for.
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