Performance Throttle Bodies

The best performance throttle bodies are sized and built for your exact engine and intake setup: billet 70mm and 72mm units for the BRZ/86/FR-S platform, adapters that mate mismatched manifolds and supercharger kits, and spacers that fine-tune the intake tract on Honda and Acura engines. This collection covers all three.

A throttle body controls how much air enters the engine, and going larger only helps when the rest of the intake can use it. Billet throttle bodies replace the factory unit with a larger-bore, CNC-machined piece for sharper response on built or boosted engines. Adapters let you bolt a larger throttle body (like a ZDX/MDX unit) to a manifold or supercharger kit it wasn't designed for. Spacers sit between the throttle body and manifold to lengthen the intake tract. Because airflow changes can affect fueling, check the manufacturer's tuning guidance, and check your year and model before ordering.

BLOX Racing builds billet intake and throttle hardware, and its 70mm billet throttle bodies for the 2013+ BRZ/86/FR-S come in raw and black finishes. BLOX is a familiar name in the Honda/Acura and 86-platform scenes for CNC-machined intake components that replace restrictive factory castings.

Torque Solution specializes in billet spacers and mounts, with throttle body spacers covering a wide Honda/Acura range: TL, TSX, Accord, Crosstour, Ridgeline, S2000, and the 2006-2011 Civic Si in 70mm and standard sizes, in red and silver anodized finishes.

Grams Performance is known for fuel system components, and its DBW electronic 72mm throttle body for the Scion FR-S, Subaru BRZ, and Toyota FT86 brings that fueling expertise to drive-by-wire throttle upgrades. It is aimed at 86-platform owners who have outgrown the factory throttle body's airflow.

aFe Power is best known for intake systems, and its throttle body spacer for the GM Silverado/Sierra 5.3L V8 shows the category extends beyond imports. Popular picks: the BLOX Racing 70mm billet throttle body and the Grams 72mm DBW throttle body for the 86 platform.

Related collections: Performance Intake Manifolds for the other half of the intake equation. For engine-build context, read Product Highlight: 2015+ FA Engine WRX.

Frequently asked questions

Will a bigger throttle body add power on a stock engine?

Usually not much. A larger throttle body helps on boosted or built engines that can move more air than the stock unit allows; on an otherwise stock engine, gains are small.

Do I need a tune after installing a larger throttle body?

Often yes, especially with drive-by-wire systems and significant bore increases, because airflow and throttle mapping change. Follow the manufacturer's guidance for your specific setup.

What does a throttle body spacer do?

A spacer lengthens the intake tract between the throttle body and manifold. It is a simple bolt-on that is popular on Honda/Acura engines; results vary by engine, so treat it as a supporting mod rather than a primary power adder.

What is a throttle body adapter for?

Adapters let you mount a throttle body to a manifold or supercharger inlet it wasn't designed for, such as fitting a larger ZDX/MDX throttle body to a CT-E supercharger kit on a 9th-gen Civic Si. Check your year and model for the correct adapter.