XForce 3" Varex Valved Cat-Back Exhaust System - Subaru WRX & STI - E4-SW05VMK5-CBS

The XForce Cat-Back Exhaust System featuring the patented Varex Rear Muffler is the ultimate upgrade for 2003–2007 Subaru WRX and STI owners who demand total control over their vehicle's acoustic personality. Expertly crafted from high-quality raw 409 stainless steel, this system utilize 3" mandrel-bent tubing to maximize exhaust flow and significantly improve engine performance. The heart of the system is the Varex valved muffler, allowing you to switch between a discreet, neighbor-friendly quiet mode and an aggressive, high-flow boxer growl at the touch of a button. Whether it's the daily commute or a weekend track day, this system provides the perfect balance of performance, versatility, and style.

What's in the Box?

• 1x 3" Raw 409 Stainless Steel Center Section with Hot-Dog Resonator
• 1x Varex Valved Oval Rear Muffler
• 2x 80mm Polished Exhaust Tips
• 1x Varex Control Kit (Wiring Harness & Remote Keys)
• All Required Gaskets and Hardware

Features:

This product offers the following high-performance features:

• Patented Varex Valve Technology: In-muffler valve control allows for manual adjustment of sound levels from stock-quiet to open-performance.
• 3" Mandrel-Bent Tubing: Ensures a smooth, unrestricted exhaust path for improved turbo spool and horsepower gains.
• Raw 409 Stainless Steel: Durable industrial-grade construction designed to withstand high heat and provide long-lasting service.
• Acoustic Versatility: Equipped with a center hot-dog resonator to refine the tone and a Varex oval rear muffler for ultimate sound customization.
• Twin 80mm Tips: Classic twin-tip design provides a clean, performance-oriented aesthetic that fits perfectly in the factory bumper cutout.

Specifications:

Important Information

• The image shown may not reflect the actual product
• Shipping times may vary depending on destination and stock availability
• Fitment Note: Fits Manual transmission vehicles only.
• Installation Note: Some models require connecting pipe E4-SW05-C1 to be ordered separately for bolt-on application when fitting to vehicles with a standalone catalytic converter.

Vehicle Applications:

 

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