The B series engine family remains a popular choice among enthusiasts seeking improved throttle response and horsepower. A 70mm throttle body can help unleash more air into the intake, potentially increasing power across various B/D/H/F-series engines when paired with the right manifold and tuning. This guide highlights select 70mm and related throttle body options from trusted brands, focusing on compatibility, build quality, and installation considerations to help you choose the right upgrade for your Honda.
| Product | Brand |
|---|---|
| Skunk2 Alpha 70mm Throttle Body (B/D/H/F) | Skunk2 Racing |
| Skunk2 Alpha 66mm Throttle Body | Skunk2 Racing |
| PQY 70MM Intake Manifold Throttle Body Kit | PQY |
| JIK 70mm Alpha Series Throttle Body | JIK |
| LSSOCH 70MM Throttle Body With Sensor | LSSOCH |
The following sections review five carefully selected throttle body options. Each entry covers key compatibility notes, notable features, and what to consider when deciding if this upgrade fits your build and goals.
Skunk2 Alpha 70mm Throttle Body for Honda B/D/H/F
Product overview: This alpha-series throttle body is precision die-cast from aluminum with a fine shot-blasted surface finish. The 70mm inlet size is designed to increase airflow relative to stock units, helping to maximize throttle response on compatible B/D/H/F-series engines. It is compatible with the OEM throttle cable, simplifying installation for many Honda builds.
Key considerations: Pros include improved intake flow and a robust aluminum construction. A potential consideration is ensuring proper manifold compatibility or the need for tuning adjustments to maximize gains. Users should verify their intake and ECU setup to avoid over-fueling or idle issues during calibration. This option suits engines that already feature a performance-oriented intake system and a tuned exhaust setup.
Compatibility and notes: Best suited for broad B/D/H/F engine family applications with compatible manifolds and fueling setups. Stock throttle cables can typically be retained, easing installation for hobbyists and professionals alike.
Tektall Throttle Body Kit for Honda B/D/H/F Series and Integra
Product overview: This kit targets multiple Honda models including B/D/H/F-series engines and Integra generations. It references replacement OE numbers such as 309-05-1050 and integrates with a manifold setup that may require Skunk2 Pro Manifold for certain configurations. The kit is designed to support compatibility with B-series, D-series, and F-series engines while focusing on a straightforward upgrade path.
Key considerations: Pros include broad compatibility and a complete set of sensors and mounting points. Consider that some installations may require a specific manifold or tuner adjustments to realize full power gains. It is best suited for builders using compatible manifolds and those who want a ready-to-install upgrade with included sensors.
Tektall 70mm Throttle Body Replacement for Integra and Civic
Product overview: This replacement throttle body lists OEM part numbers such as 309051050 and 309-05-1050 and notes compatibility with B/D/H/F-series Integra and Civic models. It emphasizes fitment and a part-number-based approach to ensure correct replacement for aging units. The set typically aims at enthusiasts replacing failed hardware or upgrading to larger bore sizing for improved airflow.
Key considerations: Pros include straightforward replacement with a recognized OEM-number-based fit. Potential cons involve the need for a compatible manifold and possible calibration adjustments to avoid idle or fueling issues. This is a practical option for people upgrading within a pre-existing performance pathway that involves matching sensors and maps.
Skunk2 Alpha 66mm Throttle Body for Honda B/D/H/F
Product overview: This 66mm option from Skunk2’s Alpha line focuses on a slightly smaller bore while retaining precision die-cast aluminum construction and a robust fit with OEM throttle cable compatibility. It offers a balance between throttle response and top-end airflow for engines not requiring the full 70mm bore.
Key considerations: Pros include strong build quality and reliable OEM cable compatibility. A potential downside is that a 66mm bore may yield smaller gains on highly modified engines compared with a 70mm option, depending on the rest of the intake system and tuning. Best used when paired with appropriately tuned manifolds and ECU calibration for incremental power gains.
PQY 70MM Throttle Body Kit with TPS & MAP Sensor
Product overview: This kit includes a 70mm throttle body with TPS and MAP sensors, designed for B/D/H/F-series Hondas. It emphasizes a larger bore for improved airflow and features idle adjustment for fine tuning. The package includes necessary sensors to facilitate installation, aiming to deliver gains in mid-range to peak power with proper calibration.
Key considerations: Pros include a complete sensor package and larger bore isolation for airflow. Considerations include the need for ECU tuning and compatible intake manifolds to maximize performance. It’s well-suited for users who want a kit that includes essential sensors without sourcing parts separately.
LSSOCH 70MM Throttle Body With Sensor
Product overview: The LSSOCH throttle body combines a 70mm bore with a wired sensor (TPS and networked MAP data) to support modern engine management systems. It lists compatibility with Acura Integra, Civic, and related B/D/H/F-series platforms across multiple years, including prelude and S2000 variants. The design aims to deliver reliable air delivery with a sensor suite for accurate fueling and idle control.
Key considerations: Pros include sensor integration for easier tuning and broad compatibility notes. As with other aftermarket throttle bodies, engine management tuning is important to realize gains and maintain drivability. Verify compatibility with your ECU and manifold, and plan for a proper mapping session after installation.
Buying Guide: Key Purchase Considerations and Comparisons
When selecting a throttle body for a B-series Honda, consider bore size, manifold compatibility, and tuning requirements. A larger bore (70mm) can improve airflow but may demand corresponding upgrades to the intake manifold, fuel system, and ECU calibration to prevent lean conditions or idle instability. A 66mm option can provide a middle ground, improving throttle response for engines with moderate modifications.
Compatibility is critical. Some upgrades require specific manifolds (e.g., Skunk2 Pro Manifold) to pair with the chosen throttle body. Ensure the replacement part matches the OE part numbers when applicable and verify sensor compatibility (TPS and MAP) to maintain proper fueling and idle control. Cable-driven throttle systems should align with the OEM throttle cable setup, while drive-by-wire variants require appropriate electronic control considerations.
Build quality matters. Die-cast aluminum bodies with precise bore tolerances and smooth internal passages typically deliver consistent throttle response and reliability. Surface finishes and corrosion resistance support long-term durability, especially under high-heat engine environments. Consider brands with established reputations for performance components, like Skunk2 Racing, to ensure fitment accuracy and customer support.
Installation and tuning: Plan for accurate calibration after installation. Depending on the engine setup, you may need a professional tune to optimize air-fuel mixtures, ignition timing, and idle control. Research whether your ECU supports the sensor signals included in the throttle body kit and whether an aftermarket intake manifold is recommended for your goals.
Budget and goals: For daily drivers seeking reliability and modest gains, a 66mm option or a reputable 70mm kit with robust tuning support can be a sensible choice. For track-focused builds, pairing a 70mm throttle body with a tuned manifold, upgraded intake, exhaust system, and ECU mapping can maximize horsepower while preserving drivability.