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Ignitions and Electrical› Computers, Chips, Modules and Programmers

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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Special Order
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The JB4 Tuner is a plug and play performance module designed for Honda 1.5L and 2.0L turbocharged engines. It connects to two sensors in the engine bay and works with the factory DME to remap boost, timing, and fueling for increased performance and reduced turbo lag. This tuner features a 64mhz processor for precise sensor sampling and offers power gains of up to 40hp and 50tq at the wheels on a stock vehicle.
Show original supplier 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.
Vehicle Symptoms
  • Car feels sluggish on highway acceleration
  • Turbo lag noticeable from stoplights
  • Engine lacks power when merging onto freeway
  • Wanting more responsive throttle and boost
  • Performance plateau after basic bolt-ons
Relevant Conversations
  • Civic 1.5T sluggish after cold start fix
  • JB4 vs Ktuner for 10th gen Accord
  • Honda 1.5L turbo tune without ECU flash
  • P0234 overboost code on Civic Si JB4
  • JB4 install instructions for CR-V 1.5L
  • Will JB4 work with PRL intercooler
  • Civic Type R JB4 base map tune
  • JB4 vs Hondata FlashPro for daily driver
  • Best piggyback tuner for L15B7 engine
  • JB4 mobile app setup and logging

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandJB4
Part NumberHONDA 1.5L TURBO JB4
CategoryIgnitions and Electrical

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