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  See all Fuel Components products
HKS Fuel Upgrade Kit Subaru WRX | STI 2015-2021 - 14007-AF003
HKS Fuel Upgrade Kit Subaru WRX | STI 2015-2021 - 14007-AF003 - Image 2 HKS Fuel Upgrade Kit Subaru WRX | STI 2015-2021 - 14007-AF003 - Image 2

HKS Fuel Injectors for Subaru WRX | STI (2015-2021)

Upgrade your Subaru WRX or STI (2015-2021) with the HKS 14007-AF003 Fuel Injectors, precision-engineered to meet the demands of high-performance applications. When your factory injectors are holding back your engine's horsepower, these larger injectors step in to deliver the fuel you need for impressive power gains.

Key Features:

  • Utilizes the latest generation BOSCH Top Feed technology, ensuring optimal fuel delivery.
  • Each injector undergoes rigorous spray testing, ensuring consistent performance across the set.
  • Enhanced injector performance reduces dead time from 1350µsec to just 900µsec at 14V and 300kPa fuel pressure.
  • Improved sealing with added O-rings and a back-up ring for the fuel line connector.
  • Includes a stock harness connector converter for easy installation.
  • Compatible with the same fuel pump found in previous HKS fuel upgrade kits, with minor modifications required for GRB/GVB models.

Specifications:

  • Injector Size: 450cc to 1000cc options available
  • Type: Top-feed and side-feed configurations

Customer Insights:

Many users have noted a significant boost in their vehicle's responsiveness and overall performance after installing the HKS 14007-AF003 injectors. These injectors not only provide the necessary fuel flow for increased horsepower but also maintain reliability during intense driving conditions.

Fitment:

  • Subaru WRX | STI (2015-2021)

Other Part Numbers:
HKS #hks14007-AF003

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Since its beginning, HKS has been committed to providing well-integrated, reliable,and environmentally sound performance systems. Mr. Hasegawa's strong leadership, engineering genius, creativity and willingness to listen to customers are the pillars of the company's success. Monitoring consumer reaction and input on issues pertaining to material quality, external appearance, sound quality, and of course, performance, HKS stays in tune with automotive enthusiasts' needs. Moreover, HKS' products are designed to be user friendly for easy installation.

Warranty for Exhaust System

HKS provides a warranty to the original purchaser of HKS exhaust systems against defects in materials and workmanship for a period of one year. The warranty applies only for vehicle specific exhaust systems. Other products such as metal catalyzers, front pipes, exhaust manifolds, and center pipes are not covered.

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Things
Sale price None
Wholesale price $960.47
Shipping Weight: 16.00
Length: 20
Width: 8
Height: 6
Product Added At Monday 21 September, 2020
Product Modified At Friday 11 July, 2025
Imported By ETLOverride
Last Edited By Turn_API
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Emissions Info
Carb Approved No
Carb Number -
Epa Status N/A
Prop65 Unknown
Carb Required -
Vendors
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Vendor Inv Cost Retail Jobber Strict MAP Core Updated
Turn 14 $813.96 $1,020.00 ? $969.00 ? 2025-07-11 10:24:55


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