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

Cat-Back Exhaust
Brand: Milltek
Part #: SSXAU469
SKU: MK-SSXAU469
Milltek Non-Resonated Cat-Back Exhaust System for Audi D4 S8 Quattro. Direct factory fitment replacement using OEM hangers and mounting points-no modification required. T304L stainless steel, mandrel-bent construction with CNC-formed collector and tail section. The non-resonated design delivers a full-throttle character without secondary resonance chambers, engineered for closed-course and track environments. 2.76" (70mm) bore maximizes exhaust scavenging across the 4.2L FSI power band. Cerakote Black-finished stainless tips resist thermal discoloration. Hand-finished welds meet OEM+ tolerances. Fitment • Audi D4 S8 Quattro (2013-2018) • 4.2L FSI V8 (not compatible with hybrid models) • Cat-back configuration (catalytic converter rearward) • Uses OEM mounting hardware and resonance isolation points Milltek cat-back systems are dyno-proven to preserve OEM throttle response while optimizing mid-range torque delivery. Hand-finished stainless and precision mandrel bending eliminate weak flow points competitors accept as standard. 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