uncomparable to a 500bhp cossie really, well most 500bhp cossies that is..WRC cars run huge boost through relatively small turbos (they have restricters fitted which ulitimately limits BHP)

500bhp cossies are usually Low Comp with large Turbos running maybe 2.5bar held

not entirely sure what boost WRC cars run,but i guess it's pretty high (40+psi) also they are much higher comp