
Cat-Back Exhaust
Milltek Resonated Cat-Back Exhaust | Lexus GX 550 3.4 Turbo V6 - Burnt Titanium TipsMilltek

Cat-Back Exhaust
Brand: Milltek
Part #: SSXAU421
SKU: MK-SSXAU421
Milltek Resonated Cat-Back Exhaust System for Audi S3 8V/8V.2 Sportback (Non-GPF). Direct factory fitment replacement using OEM hangers and valve motor integration-no modification required. Hand-finished T304L stainless steel construction with mandrel-bent piping and quad round polished trims. This resonated configuration delivers engineered tone while minimizing highway drone, preserving OE backpressure characteristics. T304Lstainless steel construction ensures corrosion resistance through harsh conditions. Precision CNC-formed components and hand-finished welds throughout. Decibel-tested for balanced acoustic character. Requires OE valve motor from your original exhaust for full compatibility. Fitment: • Audi S3 8V Sportback (2013-2018) • Audi S3 8V.2 Sportback (2013-2018, non-GPF models) • Uses existing OEM mounting points and hangers • OE valve motor integration required Every system is dyno-tested and EC-approved for quality assurance. Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Cat-Back Exhaust
Milltek Resonated Cat-Back Exhaust | Lexus GX 550 3.4 Turbo V6 - Burnt Titanium TipsMilltek

Cat-Back Exhaust
Milltek Resonated Cat-Back Exhaust | Lexus GX 550 3.4 Turbo V6 - Brushed Titanium TipsMilltek

Cat-Back Exhaust
Milltek Resonated Cat-Back Exhaust | Lexus GX 550 3.4 Turbo V6 - Cerakote Black TipsMilltek

Cat-Back Exhaust
Milltek Resonated Cat-Back Exhaust | Lexus GX 550 3.4 Turbo V6 - Polished TipsMilltek