I can't see the taipan 4.9 being replaced by the capricorn 16, it may replace the F16Taipan4.9, but as far as the taipan class 4.9 goes its established itself well here in australia, and while some are predicting its demise, I'm sure I and many of my friends will be racing taipan 4.9's well into the future, and I would doubt that production of it will cease, like the Taipan 5.7.