I have for sale a pair of 53mm bored stock throttle bodies with brass butterfly valves. Asking price for the pair is $200 outright or $150 plus your stock TBs. I can post these or pick up from Hoppers Crossing, Vic. If anyone needs a pic I will upload one when I get home. Thanks guys
Yep, stock is 50mm, 53mm is pretty much as big as a stock TB can be bored without the walls being paper thin.