XForce Varex Valved Cat Back Exhaust 2002-2007 WRX / STI | Adjustable Sound Control | Performance Exhaust System
Overview
The XForce Varex Valved Cat Back Exhaust System is a premium upgrade designed specifically for the 2002-2007 Subaru WRX and WRX STI models. This exhaust system enhances engine performance by improving exhaust flow through mandrel-bent tubing and a high-quality 409 stainless steel construction. The standout feature is the Varex rear muffler, which allows drivers to switch between a quiet and aggressive exhaust note with the push of a button, offering unparalleled versatility for daily driving or spirited track sessions.
Engineered with precision fitment and expert craftsmanship, the XForce system balances performance gains with refined sound control. The use of mandrel bending ensures smooth exhaust gas flow, reducing backpressure and optimizing power delivery. The Varex muffler’s adjustable valve technology sets this exhaust apart, giving Subaru enthusiasts the ability to tailor their vehicle’s sound to their environment without sacrificing quality or durability.
For Subaru WRX and STI owners, this cat back exhaust system delivers a significant upgrade in both auditory and performance aspects. The ability to modulate exhaust tone means you can enjoy a stealthy, comfortable ride during daily commutes and unleash a more aggressive exhaust note when pushing your car on the track or open roads. This system is a practical and stylish enhancement that complements the Subaru driving experience.
Features & Specifications
This XForce Varex Valved Cat Back Exhaust is engineered for 2002-2007 Subaru WRX and STI models and features a Varex oval rear muffler with adjustable sound control. Constructed from raw 409 stainless steel with mandrel-bent tubing, it delivers improved exhaust flow and versatile sound options for Subaru enthusiasts seeking both performance and daily drivability.
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Brand: XForce
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Product: Varex Valved Cat Back Exhaust 2002-2007 WRX / STI
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Part Number: E4-SW05-VMK5-CBS
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Fitment: 2002-2007 Subaru WRX / STI (Manual Transmission Only)
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Material: 409 Stainless Steel
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Finish: Raw Stainless Steel
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Construction: Mandrel Bent Tubing
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Origin: Not Specified
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Exhaust Tips: Twin 80mm Oval Tips
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Muffler Type: Varex Valved Rear Muffler
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Resonator: Centre Hot Dog Resonator
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Compatibility Note: Some models require E4-SW05-C1 connecting pipe for bolt-on fitment with standalone cat converter
Key Benefits
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Performance: Mandrel-bent tubing reduces backpressure for improved horsepower and torque delivery.
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Sound Control: Varex valve allows seamless switching between quiet and aggressive exhaust tones to suit driving conditions.
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Fitment: Precision-engineered for a direct bolt-on installation on 2002-2007 WRX and STI manual models.
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Durability: Constructed from corrosion-resistant 409 stainless steel for long-lasting performance.
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Aesthetics: Twin 80mm oval tips provide a clean, aggressive rear appearance that complements Subaru styling.
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Versatility: Ideal for daily driving and track use without compromising comfort or sound quality.
What's Included
- 1× XForce Varex Valved Cat Back Exhaust System
- Centre Hot Dog Resonator
- Varex Oval Rear Muffler with Remote Control
- Twin 80mm Exhaust Tips
- Installation hardware
- Installation instructions
Installation & Compatibility
Installation of the XForce Varex Valved Cat Back Exhaust is straightforward for those with moderate mechanical experience and basic hand tools, thanks to its direct bolt-on design for 2002-2007 Subaru WRX and STI manual transmission models. Some vehicles equipped with a standalone catalytic converter may require the additional E4-SW05-C1 connecting pipe for proper fitment. No major modifications are necessary, but professional installation is recommended for optimal results and to ensure proper valve operation. Tuning is not required for this exhaust system, but it is advisable to verify local emissions regulations before installation.
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Professional Installation: Recommended
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Modifications Required: None for most applications; connecting pipe may be needed for some models
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Verify Compatibility: Confirm fitment for your specific year, model, and transmission type
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