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on the 4x4 head the water jackets are bigger and stronger and the cc is slightly raised, but as for bhp there little difference when both ported, the 2wd has slightly bigger ports standard, 4x4 does aid cooling slightly.
on the 4x4 head the water jackets are bigger and stronger and the cc is slightly raised, but as for bhp there little difference when both ported, the 2wd has slightly bigger ports standard, 4x4 does aid cooling slightly.
