a little info ????
 

hey guys im brand new on here , im looking to buy a supra twin-turbo manual but can someone explain what the differnce is between the variations also the difference between uk spec and j-spec cars because i might be looking to import one , also how easy are the to mod i got a 300zx tt at the moment , i wanted to mod it up to 500bhp but i was looking at ten grand to do !!!! if i want to get this kind of power out of a supra what mods would be needed ???? will i have change the internals ????

The US-spec model has larger injectors, a longer-duration intake cam, and larger turbos.
Very:
http://www.mkiv.com/techarticles/index.html
No, you will not have to change the internals. Do you mean 500hp at the crank or at the wheels (I've seen conflicting definitions online for "bhp"...and according to SAE, "bhp" is an obsolete term). For 500 at the crank, all you'll need is 'bpu++++' modifications. For 500 at the wheels, you'll need a small single turbo. You'll also need to run some race fuel or water/meth injection.