Cat-Back AUDI S3 8V Sedan, Varex Valved XFORCE Exhaust System Including SmartBox Control Kit (ES-AS313S-VMKSB-CBS) xr8 The smart design ensures compatibility

The smart design ensures compatibility with stock components while delivering noticeable gains in performance and exhaust tone

this cat back exhaust ensures optimal exhaust flow and reduced back pressure

This feature enriches your driving experience

7 / 13270 rpm + 8

Cat-Back AUDI S3 8V Sedan, Varex Valved XFORCE Exhaust System Including SmartBox Control Kit (ES-AS313S-VMKSB-CBS) xr8 The smart design ensures compatibilityDescription 3" 304 Stainless Steel Cat Back Exhaust System With Varex Features Give your Audi 8V S3 the soundtrack it deserves with the XFORCE cat back exhaust system, complete with VAREX valve control. Constructed of 304 grade stainless steel, the XFORCE high flow 3 bore system and race style rear muffler helps reduce exhaust gas pressure for enhanced performance, whilst the integrated VAREX exhaust valve and Smartbox controller gives you complete