Catalytic Converters

Milltek Large Bore Downpipe | Ford Mustang 2.3 EcoBoost (S550 Fastback)

Brand: Milltek

Part #: SSXFD170

$1,701.30+1701 pts

In Stock

SKU: MK-SSXFD170

Ships direct from the warehouse Guaranteed fitment 30-day returns

Description

Milltek Large Bore Downpipe with integrated Hi-Flow Sports Catalyst — designed for use with OE cat-back exhaust systems. Mandrel-bent T304L stainless steel construction with significantly larger bore diameter than OEM, allowing improved exhaust scavenging and measurable performance gains. Hand-finished construction throughout. Stage 2 ECU remap required to unlock full potential. Direct bolt-on fitment using OE hangers — no modification required. Engineered to eliminate restrictive factory catalytic converter while maintaining OEM+ fitment integrity. Fitment & Compatibility: • For use with OE cat-back exhaust systems only • Stage 2 ECU remap mandatory • Direct factory fitment — no welding or modifications • Uses OEM mounting points and hangers Milltek downpipes are developed and tested across a global product range, delivering proven performance gains without compromising reliability. Designed in Tennessee and manufactured in the UK with 40+ years of performance exhaust heritage. Tested on the Tail of the Dragon.