BBK 1638 Short Catted X-Pipe for 1996-2004 Ford Mustang GT/Cobra/Mach1 4.

Vehicle Fitment

• 1996-2004 Ford Mustang GT (4.6L V8)
• 1996-2004 Ford Mustang Cobra (4.6L V8)
• 1999-2004 Ford Mustang Mach 1 (4.6L V8)

Fitment Notes

• Designed for use with BBK long tube headers - completes mid-section exhaust connection to cat-back system
• Not legal for sale or use in California or states with California emissions laws due to included high-flow catalytic converters
• Professional alignment recommended; minor adjustments may be required depending on cat-back system

Features

• High-flow X-pipe design improves exhaust scavenging for increased horsepower and torque
• 2.5" mandrel-bent tubing promotes smooth exhaust flow with minimal restrictions
• Includes high-flow catalytic converters for balanced performance
• Die-stamped performance X-section enhances exhaust pulse balancing
• Factory-style O2 sensor bungs for easy installation
• Ball-and-socket style connectors simplify alignment and installation
• Aluminized steel construction resists corrosion and heat for durability
• Bolt-on design requires no cutting or welding when used with compatible headers

Specifications

• Part Number: 1638
• Pipe Style: X-pipe mid section
• Pipe Diameter: 2.5" (63.5 mm)
• Material: Mandrel-bent aluminized steel
• Catalytic Converters: Included high-flow units
• Fitment Position: Mid-section exhaust between headers and cat-back
• Oxygen Sensor Ports: Factory-style bungs
• Connector Type: Ball-and-socket tube ends

Included Components

• 1x BBK 1638 Short Catted X-Pipe Assembly
• 2x Exhaust clamps

Product Description

The BBK 1638 Short Catted X-Pipe is a performance mid-section exhaust piece engineered for 1996-2004 Ford Mustang GT, Cobra, and Mach 1 models with the 4.6L V8. Designed to pair with BBK long tube headers, this high-flow X-pipe replaces the restrictive stock mid-pipe and enhances exhaust scavenging, unlocking additional horsepower and torque. Its 2.5" mandrel-bent tubing and X-chamber design improve exhaust pulse distribution for better engine efficiency and a more aggressive exhaust note.

Constructed from durable aluminized steel, the BBK 1638 includes high-flow catalytic converters to balance performance and street drivability. Factory-positioned O2 sensor bungs and bolt-on fitment simplify installation with compatible BBK headers and cat-back systems. This mid-section upgrade is ideal for Mustang enthusiasts seeking to maximize airflow, increase power, and enhance the sound of their V8 engine while maintaining a precise fit and high build quality.