Product Overview
XForce Audi S3 8V VAREX Cat-Back Exhaust with SmartBox
Transform the sound and character of your Audi S3 8V Saloon with the XForce VAREX 3″ Cat-Back Exhaust System with SmartBox – ES-AS313S-VMKSB-CBS.
Developed specifically for the Audi S3 8V Sedan/Saloon platform, this premium performance exhaust combines a high-flow 3-inch exhaust system with XForce’s electronically controlled VAREX valved rear muffler. The result is an exhaust system capable of providing a more aggressive performance note when desired while still allowing the driver to reduce exhaust volume for everyday driving.
Adjustable VAREX Exhaust Sound
The key feature of the XForce Audi S3 8V VAREX exhaust is its electronically controlled valve system. Rather than being restricted to one fixed exhaust volume, the VAREX muffler changes the exhaust gas path through the rear silencer.
The included VAREX SmartBox controller provides additional control through XForce’s compatible control system, giving the driver far greater flexibility over the exhaust behaviour.
This makes the system particularly suitable for S3 owners who want a more purposeful performance exhaust without having maximum exhaust volume at all times.
3-Inch High-Flow Exhaust System
XForce uses 3-inch diameter stainless steel pipework throughout the system to provide a freer-flowing exhaust path compared with a restrictive factory-style system.
The system incorporates a centre resonator before gases reach the VAREX rear muffler, helping create a balanced exhaust character while maintaining the performance-focused design of the system.
304 Stainless Steel Construction
The ES-AS313S-VMKSB-CBS is manufactured from durable 304-grade stainless steel, offering excellent resistance to corrosion and making it particularly suitable for performance cars driven throughout the year in UK conditions.
The system features brushed stainless pipework, precision-fabricated components and polished exhaust outlets for a premium appearance beneath the Audi S3.
Quad 4-Inch Polished Exhaust Tips
At the rear, the XForce system retains the aggressive quad-exit appearance associated with the S3 while upgrading it with four polished 4-inch stainless steel exhaust tips.
The larger outlets complement the rear styling of the Audi S3 8V Saloon while giving the vehicle a more purposeful performance appearance.
Designed for the Audi S3 8V Saloon
This particular XForce part number is intended for the Audi S3 8V Sedan / Saloon. The saloon exhaust system differs from the corresponding S3 Sportback system, so body style should be checked carefully before ordering.
The Audi S3 8V uses a turbocharged 2.0 TFSI petrol engine with quattro all-wheel drive. Listings for this exhaust commonly specify compatibility across the 8V-generation S3 Saloon range. Vehicle production dates, exhaust configuration and any market-specific differences should still be confirmed before installation.
Why Choose the XForce VAREX System?
- Adjustable sound: VAREX electronic valve provides controllable exhaust volume.
- SmartBox included: Advanced electronic control functionality supplied with the system.
- Performance design: Free-flowing 3-inch exhaust pipework.
- Premium material: Durable 304-grade stainless steel construction.
- Resonated configuration: Centre resonator helps shape the exhaust note.
- Premium appearance: Quad polished 4-inch exhaust outlets.
- Vehicle-specific fitment: Engineered for the Audi S3 8V Saloon/Sedan platform.
What’s Included?
- XForce 3″ stainless steel cat-back exhaust pipework
- Centre resonator section
- XForce VAREX R-Series valved rear muffler
- Quad 4″ polished stainless steel exhaust tips
- VAREX SmartBox control unit
- Associated exhaust installation components supplied by XForce
XForce ES-AS313S-VMKSB-CBS
If you’re looking for an Audi S3 8V valved exhaust that combines premium stainless-steel construction, a larger 3-inch exhaust system and adjustable sound control, the XForce ES-AS313S-VMKSB-CBS VAREX Cat-Back Exhaust provides a complete vehicle-specific upgrade for the S3 8V Saloon.
Important: Please confirm your vehicle’s exact model, body style and exhaust configuration before ordering. This part number is intended for the Audi S3 8V Saloon/Sedan and should not be assumed to fit the Sportback version.
