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Wake up the FA20 with a true 70mm bolt on upgrade
The BLOX Racing BXIM-50203 70mm billet throttle body is engineered to feed your FA20 the airflow it was always asking for. CNC machined from a solid block of billet aluminum and finished in a raw, unanodized look, this drive by wire unit is a direct bolt on replacement for the factory throttle body on the 2013 to 2020 Subaru BRZ, Toyota 86, and Scion FR-S. No tune required for installation, no rewiring, no adapters. Just bolt it in, complete the factory ECU relearn, and enjoy crisper throttle response and improved top end breathing the moment you turn the key.
Why FA20 owners choose the BLOX 70mm
- CNC machined billet aluminum construction for precise tolerances and long term durability
- True 70mm bore opens up incoming air volume over the restrictive factory unit
- 100% plug and play with the OEM drive by wire harness, no piggyback or tune required
- Raw, unanodized finish for a clean, OEM plus look under the hood
- Pairs perfectly with aftermarket intakes, headers, and catback systems for a complete bolt on stack
- Direct replacement, retains factory idle control and cruise functionality after ECU relearn
Built for naturally aspirated and forced induction builds
Whether you are chasing every last horsepower out of a naturally aspirated FA20 or feeding a supercharged or turbocharged setup, the 70mm bore reduces inlet restriction so your supporting mods can actually do their job. Owners running cold air intakes, ported manifolds, or boost see the biggest gains because the throttle body is no longer the choke point. Tight machining tolerances keep the blade sealed cleanly at idle, so you get high rpm airflow without sacrificing low speed driveability.
Fitment
This BLOX Racing 70mm billet throttle body fits the following FA20 powered chassis:
- 2013 to 2016 Scion FR-S
- 2013 to 2020 Subaru BRZ, including Limited, Premium, Series.Blue, Series.HyperBlue, and tS trims
- 2017 to 2020 Toyota 86, including Base, GT, Special Edition, and TRD Special Edition trims
Always verify your vehicle year, trim, and engine code directly against the manufacturer listing before ordering.
Specifications
- Part number: BXIM-50203
- Bore size: 70mm
- Material: Billet aluminum, CNC machined
- Finish: Raw, unanodized
- Throttle type: Drive by wire, direct OEM replacement
- Engine: 2.0L FA20 boxer four
What is in the box
- One BLOX Racing 70mm billet throttle body
- OEM style mounting hardware
Installation Instructions
- Disconnect the negative battery terminal and allow the engine to cool fully before beginning.
- Remove the engine cover, then loosen the intake tube clamp at the throttle body and disconnect the intake from the throttle body inlet.
- Unplug the drive by wire electrical connector from the factory throttle body.
- Remove the four bolts securing the OEM throttle body to the intake manifold and lift the unit off, taking care to retain the OEM gasket if it is in good condition, or replace with a new gasket.
- Clean the manifold mounting surface, then position the BLOX 70mm throttle body with a fresh gasket and torque the four bolts evenly in a cross pattern.
- Reconnect the drive by wire harness and reinstall the intake tube, fully tightening the clamp.
- Reconnect the battery, then perform the FA20 throttle body relearn procedure by turning the ignition to ON without starting, waiting 30 seconds, and then starting the engine and allowing it to idle for several minutes without touching the throttle pedal.
- Drive the vehicle gently for the first few miles to allow the ECU to fully adapt to the new throttle body.
Why buy from Black Ops Auto Works
We are enthusiast owned and operated, and we ship genuine BLOX Racing hardware sourced directly through authorized distribution channels. Questions about fitment, supporting mods, or what to pair this throttle body with on your FA20 build? Reach out before you order and we will help you spec it right the first time.
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