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

Cat-Back Exhaust
Brand: Milltek
Part #: SSXAU556
SKU: MK-SSXAU556
Milltek Resonated Cat-Back Exhaust System for Audi B8 S4 V6 / S5 3.0 Sportback. Direct factory fitment replacement using OEM hangers and mounting points - no modification required. Hand-finished T304L stainless steel construction with 2.37" (60.30mm) mandrel-bent piping. Resonated chamber tuned to eliminate drone while preserving full-throttle character. CNC-formed Cerakote Black quad tips. Engineered for improved exhaust flow and dyno-proven gains across the powerband. Fitment • Audi B8 S4 V6 Supercharged • Audi B8 S5 3.0 Sportback • Cat-back configuration (preserves factory catalytic converter) • Direct OEM+ fitment with factory hangers Specifications • Material: T304L stainless steel, hand-finished • Pipe Diameter: 2.37" / 60.30mm mandrel-bent • Resonated: Yes - engineered tone with drone elimination • Tip Configuration: Quad Cerakote Black • Installation: Direct replacement, no cutting or welding required Milltek delivers OEM+ fitment, dyno-proven performance, and engineered sound character - the standard for serious enthusiasts. 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