Last I recall there are no front brake swaps which do not require additional hardware.... Other then the Previa minivan, dual pot calipers; No upgrade to the rotors just (arguably) more evenly distributed pressure. There are kits made by a couple different people for the purpose of swaps but the MKIV fronts are not popular (if you're going to the effort there are better and easier to come by solutions). For the adapters/kits you'll probably be able to locate them from DriftMotion, possibly HorsePowerFreaks.... I think SupraSport sold a setup but I'm reluctant to recommend them.
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