This ships directly from BNR Turbo
The Stage 1 HT12 turbochargers require a core upon build up. No Y pipe needed with the core. Since we reverted back to modified HT12’s there isn’t a need to extend it like we did on the older upgrades. If your turbochargers are higher milage and they are cracked beyond repair, we have a new exhaust housing option. If you choose the new turbine housing option, we require a core (doesn’t have to be rebuidable). We only use the compressor housings, snap rings, down pipe collector and the gaskets from the core if its heavily cracked. Here are all the details on the BNR Stage 1 HT12’s!