cp-e Austenite Off Road Axle Back Exhaust 2015-2021 WRX / 2015-2018 STI | Aggressive Tone | Performance Axle Back Exhaust
Overview
The cp-e Austenite Off Road Axle Back Exhaust is a high-performance upgrade designed specifically for the 2015-2021 Subaru WRX and 2015-2018 STI. This axle back exhaust replaces the restrictive factory unit, which often prioritizes manufacturing efficiency and driver comfort over performance and sound. By upgrading to the cp-e Austenite, Subaru enthusiasts gain a more aggressive exhaust note that enhances the driving experience without the unwanted drone common in many aftermarket systems.
Engineered using advanced 3D CAD and CAM technology, the Austenite exhaust features precision CNC laser-cut flanges, mandrel-bent 304 surgical grade stainless steel tubing, and a modular design with Titan™ finish for durability and corrosion resistance. Every component is TIG welded by hand to ensure strength and a refined appearance. This attention to detail results in a system that balances raw performance with refined sound quality, making it a standout choice for Subaru owners seeking both form and function.
Beyond its aggressive tone, the cp-e Austenite axle back exhaust improves exhaust flow, reducing backpressure and smoothing turbo spool response on the FA and EJ engine platform. This upgrade is especially beneficial for those who have already upgraded their downpipe, as it removes the final bottleneck in the exhaust stream. The result is a more responsive throttle feel and a unique exhaust note that is both exotic and controlled—perfect for Subaru enthusiasts who want to enhance their car’s character without sacrificing daily drivability.
Features & Specifications
This cp-e Austenite Off Road Axle Back Exhaust is engineered for the 2015-2021 WRX and 2015-2018 STI, featuring 2.5" diameter 304 surgical grade stainless steel tubing and polished 4" dual wall tips. Constructed with precision CNC machining and TIG welding, it delivers improved exhaust flow and an aggressive, drone-free sound for Subaru enthusiasts seeking enhanced performance and tone.
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Brand: cp-e
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Product: Austenite Off Road Axle Back Exhaust
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Part Number: SBAE00001T
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Fitment: 2015-2021 WRX / 2015-2018 STI
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Material: 304 Surgical Grade Stainless Steel
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Construction: CNC Laser Cut Flanges, Mandrel Bent Tubing, TIG Welded
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Origin: Not Specified
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Tube Diameter: 2.5" from flange to tip
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Tip Size: 4" Quad Dual Wall
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Flange Thickness: 3/8" CNC Laser Cut
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Exhaust Hangers: 1/2" Thick Diameter with Locking Mechanism
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Design: Modular with CNC Machined Y Merge and Shallow Bends
Key Benefits
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Performance: Frees up exhaust flow to reduce backpressure and improve turbo spool response.
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Sound Quality: Aggressive yet refined exhaust tone with no drone during cruising speeds.
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Durability: Made from 304 surgical grade stainless steel for corrosion resistance and long life.
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Fitment: Precision CAD-designed for a factory-like fit on 2015-2021 WRX and 2015-2018 STI models.
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Quality Construction: CNC laser-cut flanges, mandrel bends, and hand TIG welding ensure strength and aesthetic appeal.
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Installation: Includes all necessary hardware for a professional and secure installation.
What's Included
- 1× cp-e Austenite Off Road Axle Back Exhaust
- Mounting hardware for complete installation
Installation & Compatibility
The cp-e Austenite Off Road Axle Back Exhaust is a direct bolt-on upgrade designed for straightforward installation on the specified WRX and STI models. While the installation is generally DIY-friendly for those with basic mechanical skills and tools, professional installation is recommended to ensure proper fitment and to avoid exhaust leaks. No major modifications are required, but verifying fitment for your specific year and trim is essential. For optimal performance gains and to fully realize the benefits of this axle back, tuning is recommended especially if combined with other exhaust or intake modifications.
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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
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