Extreme Dimensions Duraflex MTS Rear Diffuser 02-07 Subaru Impreza WRX STI 4DR | Signature Black Finish | Rear Aero Diffuser
Overview
The Extreme Dimensions Duraflex MTS Rear Diffuser is a precision-engineered aerodynamic accessory designed specifically for the 2002-2007 Subaru Impreza WRX STI 4-door models. This three-piece diffuser enhances the rear-end aerodynamics by managing airflow under the vehicle, reducing drag and improving stability at higher speeds. It is ideal for Subaru enthusiasts looking to combine functional aero improvements with a distinctive OEM+ style upgrade that complements the aggressive WRX STI aesthetic.
Constructed using a proprietary polymer blend and hand-laid 6 oz. fiberglass, this diffuser balances flexibility with durability. The Signature black finish provides a sleek, factory-inspired look, while the integrated weather-resistant aluminum mesh grille adds both style and protection. Extreme Dimensions focuses on delivering parts that withstand real-world conditions, offering increased longevity and resistance to damage compared to standard fiberglass components.
For Subaru WRX STI owners, this rear diffuser not only enhances visual appeal but also contributes to improved vehicle dynamics by reducing rear lift and turbulence. The modified aerodynamics can lead to a more planted feel during spirited driving or highway cruising, making it a practical upgrade for both street and track applications. Additionally, the reduced damage rate—up to 75% less compared to conventional diffusers—means fewer repairs and longer service life, supporting the demanding lifestyle of Subaru enthusiasts.
Features & Specifications
This Extreme Dimensions Duraflex MTS Rear Diffuser is engineered for 2002-2007 Subaru Impreza WRX STI 4-door models and features a three-piece hand-laid fiberglass construction with a signature black finish. Constructed from a proprietary polymer blend and 6 oz. fiberglass, it delivers enhanced durability and aerodynamic performance for Subaru enthusiasts seeking a functional and stylish rear diffuser.
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Brand: Extreme Dimensions
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Product: Duraflex MTS Rear Diffuser
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Part Number: 116143
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Fitment: 2002-2007 Subaru Impreza WRX STI 4DR
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Material: Hand-laid 6 oz. fiberglass with proprietary polymer blend
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Finish: Signature black finish
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Construction: Three-piece molded assembly with aluminum mesh grille
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Origin: Not specified
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Additional Features: Weather-resistant aluminum mesh grille where applicable
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Durability: Increased flexibility and damage resistance up to 75% reduction
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Warranty: Limited warranty and satisfaction guarantee
Key Benefits
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Aerodynamics: Reduces rear lift and turbulence for improved high-speed stability
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Durability: Proprietary polymer blend offers enhanced flexibility and longer service life compared to standard fiberglass
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Fitment: Designed specifically for 2002-2007 Impreza WRX STI 4DR ensuring precise OEM+ style integration
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Protection: Aluminum mesh grille guards against debris while maintaining airflow
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Visual Appeal: Signature black finish complements the aggressive WRX STI rear styling with a clean, factory-inspired look
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Value: Reduced damage rate lowers maintenance and replacement costs over time
What's Included
- 1× Extreme Dimensions Duraflex MTS Rear Diffuser (3-piece assembly)
- 1× Weather-resistant aluminum mesh grille (installed where applicable)
- Installation instructions
Installation & Compatibility
Installation of the Duraflex MTS Rear Diffuser is moderately straightforward for enthusiasts with basic bodywork experience and common hand tools. The three-piece design allows for easier handling and alignment during fitment. Minor trimming may be required depending on existing rear bumper condition or aftermarket modifications. Professional installation is recommended for optimal fit and finish, especially if paint or bodywork integration is desired. This diffuser is a direct fit for 2002-2007 Subaru Impreza WRX STI 4-door models; verify your vehicle’s year and trim before purchase to ensure compatibility.
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Professional Installation: Recommended
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Modifications Required: Minor trimming possible depending on bumper condition
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Verify Compatibility: Confirm fitment for your specific year and trim level
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