Complex sentence: The initial 2500 units were "homologation specials" used to get the FIA accreditation for entry into the World Rally Championship and were fitted with a Garrett T3/T04B turbocharger.
Split into simpler sentences: The initial 2500 units were "homologation specials" used to get the FIA accreditation for entry into the World Rally Championship. They were fitted with a Garrett T3/T04B turbocharger.