For this install, we’re going to first focus on removing the stock intake. Begin by removing the temperature sensor. This is done by pulling the grey tab up, pressing it in, and then pulling up on the temp sensor wire harness. Next, loosen up the 6mm nut that’s holding the intake tube clamp in place. At this point, we can remove the airbox from the engine bay. You can tear the box down further but I like to remove the entire thing in one piece. The airbox is held in place by 3 rubber grommets and they like to come out with the box. If this happens, remove the grommets from the bottom of the airbox and place them back in the engine bay.
Next, we have to remove the intake tube. This is held in place at 3 points. At the bottom of the intake tube, you’ll need to remove a retaining clip. The easiest way that I’ve found to do this is to slip a small flathead screwdriver into one of the exposed ridges and then pull the entire thing out. Save this clip as we’ll be needing it later on. The intake tube will also be attached to the crankcase hose. This needs to be squeezed at the knurling then pulled out. Lastly, the is an electrical wire that is attached to the other side of the intake tube. To get this wire out, you have to pull the two front tabs down and push the top back. After disconnecting these 3 things, the intake tube is now free and can be removed.
Next, locate the turbo adapter and 3.5” hump hose from the Injen kit. Attach the two parts together with the provided clamps. Only tighten the clamp on the turbo adapter side for now. At this point, we have to remove the o-ring that’s inside of the stock intake tube and place it in the groove of the turbo adapter. Be careful with the o-ring. If it’s cracked, torn, or worn out, you’ll need to replace it. Now, take the retaining clip that we removed earlier from the bottom of the stock intake tube and re-install it into the Injen turbo adapter. Make sure that the OEM o-ring and retaining clip are seated correctly. If that is so, we can move forward with installing the turbo adapter assembly into the vehicle. With this, you just have to push it into place. The retaining clip will expand and slip back into place by itself. Double-check that the assembly is seated properly and not going anywhere by giving it a little pull.
Next, we’re going to remove the temp sensor from the OEM airbox. This is held in place by two T25 torx screws. Re-install the temp sensor into the Injen intake tube. Make sure to use the provided Injen M4 button head screws and do not reuse the OEM screws in the Injen intake. Now, we can take the intake tube and attach it to the turbo adapter assembly. Once it’s in place, you can tighten the clamp. At this point, you can also attach the crankcase hose into the Injen intake tube.
Moving to the Injen airbox, we’re going to install the heatshield to the bottom of the airbox with the provided M6 screws. Next, take the filter and install it into the airbox. Once it’s seated, give the filter a 1/4” turn in either direction to lock it in place. We can now take the airbox assembly and place it in the engine bay, using the stock rubber grommets. Once it’s in place, attach the intake tube to the airbox assembly and hold the two together by tightening the clamp.
Lastly, re-connect the temperature sensor harness and we are done.
And there you have it. The Injen EVO2300 intake installed on the A90 Supra. With something like this, I typically provide some sound clips but this Supra is still in the break-in period and I don’t want to rev it like crazy so you’ll just have to subscribe to my YouTube channel for that when I release it. As far as the install, it was pretty straightforward. I didn’t personally run into any problems but if you do and need some help, drop a comment and I’ll do my best to help you out. If you want to support my work, I do have a Patreon and a variety of other outlets linked below.
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