I WAS WONDERING IF U CAN PUT TURBO KIT ON A8 MOTOR 4,2 V8, CHANGE SOME INTERNALS AND CLAIM SOME CLOSE NUMBERS TO RS6?

no one has done it but MTM does have a supercharger for ur car that they never put in to production

thanks i'll look for it , what specs do u know?
thanks again

Anything is possible if you want to spend the money.