The Hondata fuel system for the Honda L15B turbo 10th Gen Civic Si (2017-2021) consists of hardware and FlashPro Manager Software components designed to deliver significantly more fuel flow over stock (35% Injector, 39% cam/pump combo). This system enables your 1.5L turbo Honda Civic Si to take the next logical step for a reliable, well engineered and thoroughly tested fuel delivery solution. The Hondata 1.5L fuel system hardware paired with our proprietary software delivers fuel for those of you who have modifications that are limited by the stock fuel system. Although the camshaft does not make HP, it plays a key role in allowing you to use your FlashPro to tune for maximum power without the loss of fuel pressure. So if you’re ready to fuel more power or you’re simply tired of blending and would like the ability to run full E85 with your flex fuel kit, the Hondata Fuel System Upgrade is right for you.

This release is for the 10th Generation Civic Si with the Denso direct injection fuel pump. Other 1.5L models will be supported in the future.

The Kit Includes:

  • Installation instructions
  • High Flow Fuel Injectors & Clips
  • High Flow High Pressure Fuel Line
  • Injector Fly Leads
  • Camshaft
  • FlashPro software includes the mod for injector and camshaft support

Download FlashPro Manager 4.06 for the Hondata 1.5 Fuel System support.

This kit is an OEM direct replacement, meaning everything can be returned to stock. Tuning is very simple with your FlashPro device. Apply the fuel system mod to your
calibration and tune for boost, fuel and ignition as normal. If you do not have tuning experience we recommend contacting one of our many Authorized Dealers.
Hondata has tested this system for a 300 hp increase over stock to well over 500 hp. Make your 1.5 Civic a Type R beater!

The Civic Si was upgraded with:
  • Hondata FlashPro
  • Hondata 1.5 fuel system
  • Hondata 4 bar MAP sensors
  • Garrett G25 turbo
  • Custom Saenz rods
  • JE pistons
  • Darton sleeves
  • C16 race gasoline

Do I need a Hondata FlashPro?


What vehicles does this cover?

The L15B7 Civic turbo

Can I apply this to existing calibrations

There is a modification which will apply for any existing calibration you may have.  You then have the  ability to tune for more boost without loss of fuel pressure.

Was this testing done with a built engine?

The high horsepower testing was done with a built engine. The greater the torque and power, the more you will need a built engine.

Are the parts available separately?


How long does it take to install this kit

4 hours to 1 day depending on experience and tools. A Honda dealer or experienced mechanic is recommended for camshaft install.

Why is this better than secondary injectors?

  • No additional injector wiring costs
  • No additional tuning computer wiring costs
  • No additional fuel line plumbing costs and possible fuel leak risks
  • No additional tuning costs
  • This engine was designed to run with direct not port injection, so it runs smoother and cleaner

Can I return it to stock?

Yes. No wires are cut. 

This Si was upgraded with a PRL turbo kit

The Civic Si was upgraded with:

Hondata 1.5 Turbo Denso Fuel System

  • Brand: Hondata, Inc.
  • Product Code: HON-FS-1.5-Denso
  • Availability: In Stock
  • $2,600.00