Torque Solution 06-21 Subaru STI EJ Big Bore Manifold Big Bore 76mm Throttle Body Adapter – Silver

SKU: TS-SU-870P-S

Torque Solution Big Bore 76mm Throttle Body Adapter for Subaru STI, WRX, Forester XT (2004-2021) – Silver

The Torque Solution Big Bore 76mm Throttle Body Adapter, designed for seamless integration and significant performance gains. This precision-engineered adapter allows you to upgrade to a 76mm Toyota throttle body, delivering a 25% larger bore than the OEM setup for improved airflow and throttle response. Crafted from CNC-machined 6061 billet aluminum with a silver anodized finish, this adapter ensures durability, corrosion resistance, and a leak-free seal with included O-ring gaskets. It’s the go-to choice for enthusiasts pushing their Subaru STI, WRX, or Forester XT to new performance heights, particularly for builds targeting 600+ horsepower.

Why Choose Torque Solution?

This adapter stands out for its compatibility with multiple intake manifolds, straightforward installation, and robust construction. It’s designed to work flawlessly with Subaru STI OEM, Torque Solution, Cosworth, AMS, and Process West intake manifolds, offering versatility for various high-performance setups. The plug-and-play design simplifies the upgrade process, requiring only the transfer of the OEM throttle body motor, with all necessary hardware included to ensure a hassle-free installation.

What’s Included:

• Torque Solution Big Bore 76mm Throttle Body Adapter (Part Number: TS-SU-870P-S) – Silver anodized, CNC-machined 6061 billet aluminum with O-ring gaskets for a secure seal.
• Installation Hardware – Includes all necessary bolts and rivets for mounting and motor transfer.

Note: The 76mm throttle body is not included and must be sourced separately (Toyota 76mm throttle body recommended). The OEM throttle body motor from compatible Subaru models is reused.

Fitment Specifications:

• Compatible Vehicles:
  • Subaru STI (2004-2021) – Fits EJ20/EJ25 DBW engines.
  • Subaru WRX (2006-2007) – Requires OEM throttle body motor from listed models.
  • Subaru Forester XT (2004-2008) – Compatible with EJ25 DBW engines.

Intake Manifold Compatibility:

• Subaru STI OEM
• Torque Solution High Volume Intake Manifold
• Cosworth
• AMS
• Process West

Additional Requirements:

• OEM throttle body motor from 2006-2021 STI, 2006-2007 WRX, or 2004-2008 Forester XT must be transferred.
• Aftermarket MAP sensor required, relocated to the intake manifold or vacuum block.
• ECU tuning is necessary to accommodate the larger throttle body and MAP sensor.
• FMIC piping may require a 3.5-inch transition coupler and clamp for proper fitment.

Installation Details:

The Torque Solution Big Bore 76mm Throttle Body Adapter simplifies the upgrade process. Remove the OEM throttle body motor by drilling out the rivets, transfer it to the new 76mm throttle body using the provided rivets, and mount the adapter to your compatible intake manifold. The OEM connector ensures plug-and-play functionality, eliminating the need for complex wiring or spring adjustments. For optimal performance, consult your tuner to recalibrate the ECU, and ensure FMIC piping is modified as needed.

Performance Benefits:

This adapter enhances airflow by 25% over the stock throttle body, making it ideal for high-horsepower builds with upgraded turbochargers. Enthusiasts report improved throttle response and power delivery, with real-world gains like 40+ whp when paired with complementary upgrades like the Torque Solution High Volume Intake Manifold (TS-SU-675) on setups running 30 psi boost. The durable aluminum construction and O-ring seal ensure reliability under extreme conditions, making it a trusted choice for track and street applications.

Purchase with Confidence:

• Warranty: Torque Solution offers a Limited Lifetime Warranty on the adapter, ensuring long-term reliability.

Fitment Notes:

• Intended for vehicles with front-mount intercoolers aiming for 600+ HP.
• 2004-2005 STI models require a riveted throttle body; confirm compatibility before ordering.
• Custom FMIC piping or fabrication may be required depending on your setup.

The Torque Solution Big Bore 76mm Throttle Body Adapter (TS-SU-870P-S), the definitive choice for enthusiasts seeking reliable, high-performance upgrades. Order now and experience the difference in power and responsiveness