BEAMS 3SGE Modifications – Doctored Garage
Most people are using Blacktop 4AGE 20V ITBs. These are the largest of the Toyota ITBs, and most AE86 dudes who are putting a BEAMS in had a 20V at some point, or they have a buddy that had a 20V, so these throttle bodies are around. Multiple companies make ITB adapters, you just gotta pick which one you want.