The B-series engines from Honda benefit from larger throttle bodies when paired with the right manifold and sensors. This guide highlights top 70mm throttle bodies from reputable brands, focusing on compatibility with B, D, H, and F series engines. Each option emphasizes precision manufacturing, improved airflow, and ease of installation to help enthusiasts maximize horsepower and throttle response.
Summary of Selected Products
| Brand | Name | Inlet Size | Compatibility |
|---|---|---|---|
| Skunk2 Racing | Alpha Series 70mm Throttle Body | 70mm | Honda B/D/H/F Series |
| Skunk2 Racing | Alpha Series 66mm Throttle Body | 66mm | Honda B/D/H/F Series |
| PQY | 70MM Intake Manifold Throttle Body Kit | 70mm | Honda B/D/H/F Series |
| JIK | 70mm Alpha Series Throttle Body | 70mm | Honda B/D/H/F Series |
| Goodbest | 70mm Intake Manifold Throttle Body | 70mm | Honda B/D/H/F Series |
Skunk2 Alpha Series 70mm Throttle Body for Honda B/D/H/F
Brand: Skunk2 Racing. Features: Precision die-cast aluminum construction with a fine shot-blasted surface and a 70mm throttle body inlet. Designed for compatibility with OEM throttle cables, supporting straightforward installation on many B/D/H/F-series engines. This unit emphasizes smooth airflow, reduced turbulence, and repeatable performance in a street or sport setting.
Skunk2 Alpha Series 66mm Throttle Body for Honda B/D/H/F
Brand: Skunk2 Racing. Features: Precision die-cast aluminum with a 66mm inlet. Works with OEM throttle cable, enabling a clean upgrade path for engines in the B/D/H/F family. This option targets enthusiasts seeking a balance between top-end flow and throttle response, especially when paired with Skunk2 Pro Manifold setups.
PQY 70MM Throttle Body Kit with Sensors
Brand: PQY. Features: 70mm throttle body with TPS and MAP sensors included. Broad compatibility across Honda B/D/H/F series, designed to maximize horsepower gains by improving airflow and enabling precise sensor feedback. The kit is marketed with idle adjustment and a larger intake footprint for improved performance.
JIK 70mm Alpha Series Throttle Body
Brand: JIK. Features: Designed for Honda B/D/H/F series, with a 70mm inlet to support higher airflow. The part number 309-05-1050 ties to a long-standing cylinder-head and manifold compatibility approach, aiming for straightforward bolt-on installation and predictable throttle response improvements.
Goodbest 70mm Intake Manifold Throttle Body
Brand: goodbest. Features: 70mm throttle body replacement compatible with Honda B16/B17/B18/B20, D-series, F-series, and H-series engines. Marketed as a direct Alpha Series substitute for 309-05-1050, with emphasis on ease of installation and improved airflow dynamics for sheet flow and throttle response improvements.
LSSOCH 70MM Throttle Body With Sensor
Brand: LSSOCH. Features: 70mm throttle body with sensor, compatible with Acura Integra and Civic B/D/H/F series across 1.6L to 1.8L engines. Includes a TPS and MAP sensor as part of the kit, aimed at users upgrading from stock components to achieve better airflow and sensor feedback for tuning compatibility.
Buying Guide: Key Considerations For Choosing A 70mm B Series Throttle Body
- Engine compatibility: Verify that the throttle body is designed for Honda B/D/H/F series engines and that it aligns with your specific model year and ECU setup. Some options may require additional manifolds or adapters.
- Inlet diameter: A 70mm inlet is common for performance-focused builds, but a 66mm option might better suit mid-range power goals or limited space. Balance top-end gains with throttle response and packaging constraints.
- Sensor integration: Some kits include TPS and MAP sensors, which can simplify installation and calibration. Consider whether you need integrated sensors or if you plan to reuse your OEM sensors.
- Manifold compatibility: Certain products advertise compatibility with Skunk2 Pro Manifolds or similar aftermarket manifolds. Ensure you have compatible hardware or be prepared to upgrade other components in the intake tract.
- Material quality: Die-cast aluminum offers durability and consistent airflow, while surface finishes (shot-blasted, anodized) reduce corrosion and help maintain consistent performance over time.
- Installation effort: Some units are direct bolt-ons with minimal modification, while others may require port matching or ECU tuning. Factor in your mechanical skills or shop support.
- Performance expectations: Upgrading to a 70mm throttle body tends to improve top-end power and throttle response, especially when paired with a performance intake, header, and exhaust system. Real-world gains vary by engine, tune, and supporting hardware.
- Vehicle usage: For daily drivers, prioritize reliability and drivability. For track or street-legal race setups, consider a tune, cold-start calibration, and sensor compatibility to maintain safe air-fuel ratios.
Note: This article focuses on 70mm throttle bodies commonly used with B-series, D-series, H-series, and F-series Honda engines. Always confirm current compatibility with your exact engine code, manifold, and ECU setup before purchasing.