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

Cat-Back Exhaust
Brand: Milltek
Part #: SSXAU651
SKU: MK-SSXAU651
Milltek 2.50" Non-Resonated Cat-Back Exhaust System for Audi B9 S4 and S5 (non-sport differential models). Direct factory fitment replacement engineered to deliver increased exhaust flow, dyno-proven performance gains, and an aggressive engineered tone without resonance chambers. Constructed from T304L stainless steel, mandrel-bent throughout with hand-finished construction. The non-resonated design eliminates mid-range resonance to unlock full-throttle character while maintaining OEM+ fitment. Uses factory hangers and mounting points-no modification required. Fitment • Audi S4 3.0 Turbo V6 B9 Saloon/Sedan & Avant (non-sport differential only), 2016+ • Audi S5 3.0 Turbo V6 B9 Sportback (non-sport differential only), 2017+ Cat-back design: replaces rear silencer and tailpipes only. OEM cat and downpipe retained. For turbo-back coverage, see Milltek Turbo-Back systems. Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Cat-Back Exhaust
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Cat-Back Exhaust
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Cat-Back Exhaust
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Cat-Back Exhaust
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