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

Cat-Back Exhaust
Brand: Milltek
Part #: SSXFD439
SKU: MK-SSXFD439
Milltek valved non-resonated cat-back exhaust system engineered for the Ford Mustang 2.3L S650 Fastback. Direct factory fitment using OEM hangers and mounting points - no modification required. Requires OE GT 5.0 Rear Diffuser for proper fitment. Hand-finished T304L stainless steel construction with brushed titanium trims and mandrel-bent primary piping. Engineered for full-throttle note character with mid-range punch and top-end clarity. The integrated valve system modulates exhaust tone and reduces interior drone at cruise, while non-resonated design delivers uninhibited sound on track or closed-course driving. Fitment specifications: • Ford Mustang 2.3L EcoBoost - S650 Fastback (2024+) • Direct bolt-on installation using existing OEM hangers • Compatible with OE GT 5.0 Rear Diffuser (required) • Valved system compatible with OEM active exhaust controls EC-approved construction meets precision standards for dyno-tested performance gains and engineered sound character. Designed in Tennessee and manufactured in the UK with 40+ years of performance exhaust heritage. Tested on the Tail of the Dragon.

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