XForce Audi S3 Sportback (2013-2021) 3″ Cat Back System with Varex Muffler & Smartbox Controller
£1,841.67
- Description
- Additional information
- Vehicle Fitment
- Shipping & Returns
- Warranty
- Question about this product?
XForce Audi S3 Hatch (2013-2021) 3″ Brushed Stainless Steel Cat Back System with Varex Muffler & Smartbox Controller
Unleash the full potential of your Audi 8V S3 Hatch with the XFORCE VAREX SmartBox-equipped cat-back exhaust system. This system doesn’t just upgrade your exhaust—it redefines how you experience sound and control behind the wheel.
Constructed from brushed 304 stainless steel, the system features 3” mandrel-bent piping, a hot dog resonator, and a redesigned VAREX valved rear muffler, giving you a bold, aggressive tone when open and a refined, near-stock sound when closed. It’s daily-driveable with the flexibility to turn heads when you want to.
Paired with the VAREX SmartBox, you gain the most advanced exhaust control available. Choose from:
- Matrix Mode: Automatically adjust valve position based on speed, RPM, or throttle input.
- Manual Mode: Fine-tune valve position in real time via the XFORCE app or remote.
- Geo Mode: Program valve behavior by location—quiet in your neighborhood, loud on your favorite backroad.
- Factory Mode (with optional cable): Seamlessly link exhaust behavior to your Audi’s built-in drive mode settings.
System Features:
- 3” mandrel-bent 304 stainless steel construction
- Drone canister tube for reduced cabin drone
- Redesigned VAREX valved muffler for maximum sound range
- Quad 4” polished double-wall tips
- Bolt-on design with all necessary hardware included
- Includes VAREX SmartBox for full app and remote control
- Drive mode integration harness included
WHAT IS THE SMART BOX?
Varex Smart Box is a control device with patent-pending technology that let the user to manually and automatically adjust the exhaust sound level of the Varex exhaust.The users can operate and make a change to the settings of the Smart Box via an elegantly designed Smartphone App.The connections between the Smart Boxes and the smartphones are via the latest Bluetooth® technology, which provides an exceptionally reliable and smooth user experience.Smart Box provides the following functions:
MANUAL MODE:
- Precise manual adjustment of VAREX exhaust valve positions;
- Custom pre-set of VAREX exhaust valve positions;
MATRIX MODE:
- Automatic control of VAREX exhaust valve positions based on real-time information of RPM, Throttle, and Speed. (ONLY FOR VEHICLES EQUIPPED WITH OBDII)
GEO MODE
- User can define a region on the map and then set a particular exhaust sound for location by dragging a circle on the smartphone screen. Multiple regions are allowed to be set and memorized.
INSTALL GUIDES
| Weight | 32 kg |
|---|---|
| Dimensions | 119 × 38 × 46 cm |
| Brand |
ESAS38VHVKSB Confirmed Fitment
Please note, this information is a combination of supplier provided compatibility data and our workshop expertise. While every effort has been made to ensure the accuracy of this information Progressive Parts Ltd are not liable for abnormalities or inaccurate data. Customers are wholly responsible for checking fitment for their vehicle. More information is available from our Terms & Conditions
UK Shipping
All items marked as available for 'Express Delivery' are dispatched next working day before 3pm.
If you order contains a mixture of 'In Stock', 'Stock Order' or 'Backorder' items, your order may be split to optimise logistics and improve delivery times.
Out of stock items are sourced from our extended inventory and supplier inventory where possible. These may require manufacturing or carry extended lead times which we endeavour to alert you about if the website hasn't already provided an estimated delivery timescale.
DELIVERY INFORMATION
International Shipping
For accurate pricing, please visit the website checkout which will automatically generate a shipping quote to your country.
If your delivery address is outside of the UK, local tax will be removed and you will have to pay import duties and taxes when the shipment reaches your country.
All international shipments may be subject to cross-border inspections by customs authorities while customs policies vary widely from country to country. You must meet any additional charges for customs clearance and we recommend that you contact your local customs office for further information.
DELIVERY INFORMATION
Returns
Progressive Parts operates a 14 day return period from the date of delivery for unused products.
Follow the returns process below for our team to generate you an RMA ID and instruct you to return the goods.
RETURNSWarranty Information
This product is supplied with a manufacturer’s warranty only. No additional warranty is provided by Progressive Parts Ltd. (Our Terms & Conditions)
For details of coverage, terms and conditions, please refer to the manufacturer’s warranty information below or visit their website.
XForces's Warranty Policy
All Products are designed for race and off-road use only and are not designed for use on roads or related areas including car parks.
Product Type Warranty Period:
| Stainless Steel Exhaust Systems | 60 Months |
| Mild Steel Exhaust Systems | 24 Months |
| Catalytic Converters | 12 Months |
| Electronic Components | 12 Months |
| Universal Stainless Steel Mufflers | 24 Months |
| Universal Mild Steel Mufflers | 12 Months |
| Accessories | 12 Months |
| Stainless Steel Headers | 24 Months |
| Mild Steel Headers | 12 Months |
WHAT IS COVERED BY THIS WARRANTY
- Xforce warrants that the Products will be free from defects in material and manufacture for the Warranty Period.
- No repair or replacement during the Warranty Period will renew or extend the Warranty Period past the Warranty Period provided from the original date of purchase of the Products by You.
WHAT IS NOT COVERED BY THIS WARRANTY
- This Warranty does not apply to any Product that:
- has not been purchased from an Authorised Dealer;
- is a second-hand Product;
- is made known to You at time of purchase and on the relevant tax invoice for the purchase of the Products that this Warranty does not apply. Circumstances where this Warranty does not apply include Products that are sold with defects or faults and such defects or faults are drawn to Your attention prior to You purchasing such Products;
- has been modified or changed
- has had the serial number removed, altered or made illegible.
- This Warranty does not apply to any defect in the Product caused by:
- failure to use or properly maintain the Product in accordance with Company's instructions or recommendations;
- abnormal use of the Product;
- any accident, neglect, abuse, accidental damage, incidental damage, incorrect application, misuse of the Product;
- Improper, incomplete or incorrect installation or fitment; or
- normal wear and tear.
- This Warranty does not apply to:
- gaskets, seals or nuts and bolts of the Product;
- any consequential damage/s;
- failure to order the correct Product; or
- change of mind.
- A cause independent of the human controls which occurred after the goods left the control of the manufacture.
- The Company is a parts supplier only, and not liable to defective fitment of the Products.
- This Warranty is not transferrable.
Sport/Performance Catalysts are not guaranteed to pass emissions tests and failure to do so does not constitute a warranty claim.
Starting a Claim
Please contact our team directly via email. You will be supplied a warranty form and instructions on how to complete your claim.
Question about this product?
Our team will respond as quickly as possible, please also consider using the chat widget (located bottom right of the webpage).
Stock at Progressive Parts
Delivery timescales are given as estimates in good faith, but cannot be taken as precise or exact information. We highly advise against booking installation/workshop time or engaging in preparatory work until you've received and inspected the goods.
What do our stock statuses mean?
1+ IN STOCK in green stock is readily available in one of our warehouses for express delivery (at the time of viewing).
LOW STOCK in green means we're running low! 1 or 2 left on the shelf so act fast. Over evenings, weekends and bank holidays this stock can move quickly so please bear this in mind.
0 IN STOCK in blue means our primary warehouse does not have unallocated stock, but our UK partners do. Often these can be shipped quickly and efficiently. You'll be notified via the Track My Order page if further delays are unavoidable.
MADE TO ORDER in blue means we've partnered with a supplier which primarily makes their products to order. It's not on our shelf, but your order goes into production immediately.
0 IN STOCK in orange means everybody we work with is unfortunately out of stock. Stock is not available in the UK. The best course of action is to place an order to create an allocation from the next batch arriving.
OUT OF STOCK in red. This product is unavailable to order, for whatever reason we're unable to obtain stock or there is an issue with supply/lead times.
We're tuners too!
Our staff are car enthusiasts, we understand the need for speed... This includes getting your orders out the door as quickly and securely as possible!
In some instances, extended lead times are unavoidable. This is as labour-intensive and frustrating for us as it is for you, please know we are doing our best to facilitate your modification goals. Abuse of our staff or systems will not be tolerated.
Thank you, Team PP
For emissions components this encompasses noise, emissions and balanced back pressure, which have a strong influence on maintaining engine performance (power), and fuel efficiency. Type approval ensures that an aftermarket component will reach, or exceed the performance standard of the corresponding OE part.
Type-approval then, is a certain guarantee that an end user will receive a product of OE equivalent performance attributes.
Products on the Progressive Parts website that meet this approval will be clearly marked or labelled EC or ECE approved.