The 13B-T has just one twin-scroll turbocharger plus the 4-injector fuel injection in the 13B-DEI. You will find not variable ingestion and 6PI methods. The 13B-T engine attributes the 4 port intake design which just like early 13B engines from 70's.My first time purchasing a used JDM Mazda RX-seven FD 13B-REW engine and had alot of uncertainty. En