Nostrum Upgraded Direct Injectors 2022-2026 WRX / 2022+ Ascent / 2020+ Legacy XT / 2022+ Outback XT | +24% Flow Rate | High-Flow Direct Injectors
Overview
The Nostrum Upgraded Direct Injectors are a precision-engineered fuel system upgrade designed specifically for the Subaru FA24 engine found in the 2022-2026 WRX, 2022+ Ascent, 2020+ Legacy XT, and 2022+ Outback XT models. These injectors increase fuel flow by 24% over stock while maintaining OEM-level spray quality and min-pulse width performance. They are ideal for Subaru enthusiasts seeking reliable, high-flow injectors that support increased power output and E85 compatibility without sacrificing drivability or idle quality.
Developed with a focus on quality and fitment, Nostrum’s injectors use a custom design that replicates the OEM spray pattern to ensure optimal fuel atomization and combustion efficiency. One injector features an extended harness connector to clear the FA24’s cast aluminum coolant crossover pipe, simplifying installation without engine modifications. By moving away from limited dealer-sourced cores to a more cost-effective solution, Nostrum delivers a performance upgrade that balances flow, spray pattern, and reliability at a competitive price point.
For Subaru owners, these injectors provide a critical foundation for tuning and power upgrades. The improved flow supports higher horsepower goals while maintaining smooth cold starts, stable idle, and reduced knock risk. Pairing these injectors with Nostrum’s high-pressure fuel pump upgrade unlocks even greater fueling potential, making this combination a comprehensive solution for FA24-powered Subarus aiming for enhanced torque and peak power. This upgrade is a practical choice for daily drivers and track enthusiasts alike.
Features & Specifications
This Nostrum Upgraded Direct Injector set is engineered for 2019-2026 Subaru Ascent, 2020-2026 Legacy XT and Outback XT, and 2022-2026 WRX FA24 engines. Featuring a +24% flow increase and OEM-equivalent spray pattern, these injectors are constructed with high-quality materials to deliver consistent fuel delivery and improved combustion for Subaru enthusiasts seeking reliable power gains and tuning flexibility.
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Brand: Nostrum
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Product: Nostrum Upgraded Direct Injectors 2022-2026 WRX / 2022+ Ascent / 2020+ Legacy XT / 2022+ Outback XT
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Part Number: H720-2106
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Fitment: 2019-2026 Ascent, 2020-2025 Legacy XT / Sport, 2020-2026 Outback XT / Wilderness, 2022-2026 WRX
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Material: High-grade injector components with OEM-equivalent cores
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Finish: OEM-style coating and connectors
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Construction: Precision engineered with custom orientation spring clips and extended harness on one injector
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Origin: Developed and assembled with proprietary manufacturing processes (Origin not specified)
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Power Gains: +24% flow rate increase over stock
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Tuning Required: Yes, ECU calibration recommended
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Ethanol Compatibility: Fully compatible with E85 fuel
Key Benefits
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Performance: Increased fuel flow supports higher horsepower and torque gains on FA24 engines.
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Fitment: Direct replacement with custom orientation clips and extended harness injector for easy installation without engine modifications.
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Quality: OEM-equivalent spray pattern ensures optimal fuel atomization, reducing knock risk and improving drivability.
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Reliability: Designed to maintain smooth idle and cold start performance even under increased fueling demands.
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Compatibility: Fully ethanol compatible, supporting flexible fuel tuning strategies including E85.
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Support: Includes tuning guide and installation instructions with access to calibration engineers for technical assistance.
What's Included
- 1× Set of 4 Nostrum Upgraded Direct Injectors (batched and serialized)
- Installation instructions
- Tuning guide (available to dealers and certified tuners)
Installation & Compatibility
Installation of the Nostrum Upgraded Direct Injectors is designed to be a direct replacement with no permanent engine modifications required. One injector features an extended harness connector to clear the FA24’s coolant crossover pipe, simplifying fitment. While the physical installation is straightforward for experienced enthusiasts, professional installation is recommended to ensure proper handling of fuel system components and to avoid damage. ECU tuning is required to optimize fuel delivery, cold start behavior, and fuel trims. We recommend working with a certified tuner familiar with Subaru FA24 engines and Nostrum products.
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Professional Installation: Recommended
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific year and trim level before purchase
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