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JB4

Performance Module for Honda 1.5L/2.0L Turbo Engines

$774.48 $529.00 Save $245.48

SKU: HONDA 1.5L TURBO JB4

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In Stock
Ships by Aug 3
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INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The JB4 Tuner is a plug-and-play performance module designed for Honda 1.5L and 2.0L turbocharged engines. It installs discreetly by connecting to two accessible sensors in the engine bay, working with your factory DME to remap boost, timing, and fueling for enhanced performance and reduced turbo lag. This system utilizes a 64mhz processor and dedicated 10-bit digital-to-analog converters, sampling sensors 1000 times per second to ensure smooth and potent power delivery. Experience significant gains, with up to 50 horsepower and 60 torque increase possible on the 1.5L Honda Civic Turbo motor (40hp and 50tq at the wheels on a stock vehicle without the risks associated with ECU flashing). The JB4 is fully reversible, removing without a trace when necessary, and does not affect fuel economy during normal driving. It is compatible with all driving modes and both manual and CVT transmissions. The JB4 system features CANbus OBDII integration, allowing it to read advanced engine data such as boost, timing, air/fuel ratios, fuel trims, throttle position, and knock control for comprehensive logging and diagnostics via the free JB4 PRO smartphone app. The app also enables map changes, firmware updates, and detailed log analysis. Multiple maps are available, ranging from a disabled mode to custom tuning maps and high-boost E85 maps. The tuner is built with a rugged billet aluminum enclosure and comes with a 5-year warranty. It is designed and assembled in the USA. Fitment includes various 2016-present Honda Civic, Civic Si, Accord, CR-V, and HR-V models with 1.5L/2.0L turbo engines. The Type-R variant is also supported.

MIA's Description

The JB4 Tuner is a plug-and-play performance module for Honda 1.5L and 2.0L turbo engines. It connects to existing sensors to remap boost, timing, and fueling for optimal performance and reduced turbo lag. The system features a 64mhz processor and samples sensors 1000 times per second with 10-bit converters for smooth power delivery. Gains of up to 50 horsepower and 60 torque are possible on the 1.5L Civic Turbo motor, with up to 40hp and 50tq at the wheels.

Fitment

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Specifications

BrandJB4
Part NumberHONDA 1.5L TURBO JB4
CategoryIgnitions and Electrical

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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