Compressive Tuning SmartFlow Shroud
Designed for 2015–2021 Subaru WRX and STI
Part #: SFS151-WT
Overview
The SmartFlow Shroud represents a thoughtful evolution in radiator shroud design, engineered to enhance airflow management within your Subaru’s engine bay. Crafted for dedicated WRX and STI enthusiasts, this three-piece shroud directs fresh, cool air from the grille straight into the intake system, supporting improved thermal efficiency and optimized engine breathing.
Whether your build is stock or heavily modified, the SmartFlow Shroud helps maintain cleaner, cooler air delivery to your intake box, contributing to a more responsive and consistent performance experience. It’s a functional upgrade that complements your vehicle’s existing setup with precision and purpose.
Key Features
Engineered to improve airflow and intake efficiency, the SmartFlow Shroud offers:
- Three-piece modular design for targeted air direction
- Optimizes fresh air delivery from grille to intake box
- Enhances thermal management under varied driving conditions
- Precision fitment tailored to 2015–2021 WRX and STI platforms
- Durable construction designed for long-term reliability
- Supports both stock and extensively modified engine setups
Installation
The SmartFlow Shroud installs directly into your vehicle’s existing radiator shroud location, designed for a straightforward fit without the need for extensive modifications. Installation is intended to be accessible for enthusiasts comfortable with basic engine bay work, ensuring a clean integration that maintains factory alignment and function.
SmartFlow Radiator Shroud for 2015-2021 WRX/STI
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The Compressive Tuning SmartFlow Radiator Shroud is a precision-engineered cooling component designed specifically for the 2015–2021 Subaru WRX and STI models. This three-piece shroud enhances airflow management by directing fresh, cool air from the grille directly into the intake system, improving thermal efficiency and engine breathing. Constructed with durable materials tailored for high-performance applications, the SmartFlow Shroud supports better heat dissipation and helps maintain optimal operating temperatures under demanding conditions. Its innovative design contributes to improved engine performance and reliability, making it an essential upgrade for enthusiasts seeking enhanced cooling and airflow control.
This radiator shroud fits 2015–2021 Subaru WRX and STI vehicles, providing a direct replacement solution that integrates seamlessly with the factory cooling system. Ideal for street, track, and performance builds, it is designed to optimize airflow without requiring extensive modifications. The kit includes all three shroud components necessary for installation, ensuring a straightforward bolt-on upgrade. This product is perfect for owners aiming to improve cooling efficiency and engine response in daily driving or competitive environments while maintaining OEM fitment and function.
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Compressive Tuning SmartFlow Shroud
Designed for 2015–2021 Subaru WRX and STI
Part #: SFS151-WT
Overview
The SmartFlow Shroud represents a thoughtful evolution in radiator shroud design, engineered to enhance airflow management within your Subaru’s engine bay. Crafted for dedicated WRX and STI enthusiasts, this three-piece shroud directs fresh, cool air from the grille straight into the intake system, supporting improved thermal efficiency and optimized engine breathing.
Whether your build is stock or heavily modified, the SmartFlow Shroud helps maintain cleaner, cooler air delivery to your intake box, contributing to a more responsive and consistent performance experience. It’s a functional upgrade that complements your vehicle’s existing setup with precision and purpose.
Key Features
Engineered to improve airflow and intake efficiency, the SmartFlow Shroud offers:
- Three-piece modular design for targeted air direction
- Optimizes fresh air delivery from grille to intake box
- Enhances thermal management under varied driving conditions
- Precision fitment tailored to 2015–2021 WRX and STI platforms
- Durable construction designed for long-term reliability
- Supports both stock and extensively modified engine setups
Installation
The SmartFlow Shroud installs directly into your vehicle’s existing radiator shroud location, designed for a straightforward fit without the need for extensive modifications. Installation is intended to be accessible for enthusiasts comfortable with basic engine bay work, ensuring a clean integration that maintains factory alignment and function.
SMART, FUNCTION
Compressive Tuning proudly presents the Smart Flow Shroud, the first radiator shroud that actually improves performance with functionality. The three-piece design of the Smart Flow Shroud catches and directs air from the grille into the air intake box, driving the most airflow of fresh cool air into the intake system. The Smart Flow Shroud will give a boost in performance from stock-to-heavily modified applications, and everything in between.
REVOLUTIONARY
Compressive Tuning has developed this product to fit seamlessly with the stock bay designed by the engineers of Subaru. There is no need to cut, drill, or make any changes on your application. The Smart Flow Shroud will fit to your stock engine bay using stock hardware with no modifications. Making this one of the easiest shrouds to install.

