alot of people cite the fact that supra and skyline engines can put out xxx horsepower with stock internals

but imagine if this is really feasible, or relevent for that matter
let's assume you CAN boost the skyline or supra engine to say 800 horsepower with stock internals, this would require a HUGE turbo and HUGE boost, also the fuel system would need to be redone, the intake and exhaust massively reworked as would the transmission brakes cooling system tyres etc... wuts a thousand $ more for a few forged pistons and crankshaft ...

plus what if you dont want to boost your skyline or supra ?? the intial cost would have had the extra toughened up components factored into it, but you're never using that potential, and are paying more then what you are getting from it

this is all assuming that the above claimed statement is true, which i doubt
1000 horsepower is ALOT of power, requiring something like 6 bar absolute boost pressure with just 2.6 litres of displacement, whereas stock is like 2 bar of boost MAX