2022+ BRZ/GR86 Intake Inlet Tube

thingiverse

This is version one of an air intake inlet tube for a 2022+ Subaru BRZ or Toyota GR86. This replaces the stock, stiff rubber unit. This new piece used a drawn out curve to try and improve airflow. Unfortunately, after CFD analysis of both a "stock like" inlet and the new piece, the new piece flows 1-2% worse than the stock geometry. This doesn't take into account the turbulence caused by the ribbing which will likely reduce the difference so it is negligible(it probably is anyways). Version two will utilize a simpler geometry like the stock piece but without the ribbing for hopefully better flow. Version one also contains an inlet on the bottom to fit the stock resonator where version two will have printed attachments for resonators and will allow you to make different sized resonators to tune the specific frequencies. In order for the resonator to fit, the inlet needs to have an ID of 25mm or SLIGHTLY less. The resonator will use a friction fit but can be secured using glue or a simple screw/bolt through the neck of the resonator. It may still be a tight fit in which case I would recommend cutting a vertical slit on both sides of the resonator neck to allow it to compress slightly to fit into the Inlet. To fit the Inlet you will need two 3.125" silicone couplers, I got mine from Vibrant because they were the only ones I could find in that size. The one attached to the stock airbox will most likely need to be shortened to fit. In order to fit the PCV hose you will need to remove the stock plastic barb so the hose can slip over the new piece.