If you’re looking to take your Subaru's performance up a notch, the Torque Solution Big Bore 76mm Throttle Body Adapter is a solid choice. Designed specifically for Subaru EJ engines, this adapter makes it easy to swap in a Toyota 76mm big bore throttle body. Why? Well, it gives you a 25% increase in size compared to the stock setup, which can really help with airflow and throttle response. It’s a game changer for anyone pushing their Subaru to the limits.

Constructed from CNC'd 6061 billet aluminum, this adapter isn’t just tough—it’s also anodized to resist corrosion. You won’t have to worry about it falling apart under the hood. Plus, it comes with O-ring gaskets that ensure a leak-free seal, so you can focus on driving instead of chasing down pesky vacuum leaks. And if you’re worried about the install, don’t be; it comes with all the necessary hardware to get the job done right.

What’s in the Box?

• Billet Spacer (1)
• Large O-ring (2)
• Small O-ring (4) - these keep the M6x20 screws snug on the spacer
• M6-1.0 x 20 Low Profile Zinc Socket Cap Bolt (4) - attaches the spacer to the intake manifold
• M6-1.0 x 50 Stainless Steel Socket Cap Bolt (4) - secures the throttle body to the spacer
• M6 Zinc Flat Washer (4) - for the TB to spacer connection
• Rivet (7) - to attach the OEM throttle body motor to the big bore throttle body
• M4 Nylock Nut - used as a rivet spacer tool for the motor cover near the harness plug

Compatibility

This adapter is a perfect fit for various intake manifolds, including the Subaru STI OEM, Torque Solution, Cosworth, and AMS manifolds. If you’re using the Toyota throttle bodies, it’s confirmed to work with part numbers 22030-0S010 and 22030-0F010. Sure, it might work with others, but those are the ones you can count on.

Fitment Details

Here’s where this adapter shines:

• Subaru STI (2004-2021, but needs a 2006+ riveted throttle body)
• Subaru WRX (2006-2014, with some intake manifold swapping for 2008-2014)
• Subaru Forester XT (2004-2008)

Heads Up

• This setup is geared toward high horsepower builds, so make sure to chat with your tuner before diving in.
• You’ll need to transfer over the motor from a Subaru DBW throttle body found on 2006-21 STI, 2006-07 WRX, and 2004-08 Forester XT.
• Don’t forget about the FMIC piping—modifications might be necessary to make everything fit just right.
• A new transition coupler and clamp for the big bore throttle body (3.5 inches) will be essential for connecting to your piping.
• Lastly, an aftermarket MAP sensor is a must, and you’ll need to relocate it to the intake manifold or a vacuum block. Your tuner will also need to adjust your tune to accommodate the new throttle body and MAP sensor.

Overall, if you’re serious about squeezing more power out of your Subaru, the Torque Solution Big Bore 76mm Throttle Body Adapter is definitely worth considering. Just make sure you’ve got everything lined up with your setup, and you’ll be ready to hit the road with a whole new level of performance.