well most likely he can just replace rings and bearings seals etc...or if he wants "at best" the can go forged internals which is the smartest to do..but either way 2nrwerks does great work and can work with ur friend to figure out what he wants done..but let him know if he cuts corners and uses stock pistons rods...theres not a guarantee itll hold under boost forever..or very long..depending on what hp goals he has...not sure if ur boy knows limits etc..