Throttle Body Spacer for Toyota 4Runner (2010-2024) 4.0L

Billet Throttle Body Spacer for 2010-2024 Toyota 4Runner

What it Does: Increases intake plenum volume and smooths incoming air charge between the throttle body and intake manifold to sharpen off-idle throttle response and improve low-end torque delivery.

The Stock 4Runner Low-RPM Velocity Deficit

The factory 1GR-FE intake tract routes air through a composite manifold optimized for noise attenuation rather than high-velocity flow. At lower engine speeds and initial throttle tip-in, the abrupt transition into the intake plenum introduces boundary layer turbulence and localized air stalls. This flow disruption delays cylinder filling efficiency, producing the sluggish off-idle response and noticeable low-end torque hesitation common in heavy fifth-generation platforms.

The Engineering Solution

CNC-machined from solid billet aluminum with a protective anodized finish, this direct-fit spacer adds critical plenum volume directly upstream of the manifold runner entries. The open-bore helical geometry organizes incoming air, mitigating boundary layer separation and accelerating charge velocity into the combustion chambers. Machined to strict OEM tolerances, it installs seamlessly onto the factory throttle body flange without requiring ECU calibration or risking vacuum seal integrity.

Technical Specifications

Compatibility

• 2010-2024 Toyota 4Runner (SR5, Trail, TRD Off-Road, TRD Pro, Limited, Nightshade, Venture) 4.0L V6

The Toyota Trail Durability Standard

Built to withstand extreme chassis articulation, constant trail vibration, and heavy payload demands, this billet hardware upgrade eliminates common plastic wear issues while delivering reliable, predictable throttle modulation in demanding off-road conditions.