Easier Said than done mate
500hp on AWD with what engine ? Please elaborate
Golf mk4 ( R32/R) R has 2 litre turbo charged petrol engine with power to all 4 wheels of the car (my mate's mate bought one) and putting 500 horses on all wheels is a dream for smaller engine.(even if you did on higher RPM range you will end up thrashing the engine)
Well lets be realistic , my car is 2.5 Litre RB25DET Engine ( skyline R33 Series II) , got Haltech Pro plus ECU , Front mount intercooler, garret hiflow turbo, Boost controller (14 psi boost) , ngk iridium spark plugs , aftermarket coil packs , 1000CC injectors , cusco fuel catch can , pod filter intake , 3" jasma Exhaust stainless steel.
and car is making 330 HP on rear wheels , am pretty sure you know RB engines are tuner fav engines don't you