X-Pipe Catted 2.5in 05-10 Mustang 4.6L

The X-Pipe Catted 2.5in 05-10 Mustang 4.6L by KOOKS HEADERS is a bolt-on performance exhaust component designed for fifth-generation Mustang owners looking to enhance their vehicle's performance while remaining street legal. This catted crossover pipe replaces the factory H-pipe and integrates seamlessly into your existing exhaust system, allowing you to unlock the breathing potential of your 4.6L modular engine.

KOOKS engineered this 2.5-inch diameter X-Pipe with mandrel-bent 304 stainless steel tubing and integrated high-flow catalytic converters to balance scavenging efficiency with durability. The X-configuration design promotes optimal exhaust scavenging by directing each cylinder bank's exhaust pulses to maximize velocity and reduce backpressure across the full RPM range. The catalytic converters are OEM-spec direct fit units that eliminate the restrictive stock H-pipe while maintaining federal CARB-Legal emissions compliance.

This catted X-pipe is compatible with 2005–2010 Mustangs equipped with the 4.6L V8 engine and works as a direct bolt-on replacement with stock or aftermarket headers, requiring no welding or modifications. Installation typically takes 2–3 hours with basic hand tools and a jack stand setup. Pair this with aftermarket headers and cat-back systems for optimal performance gains.