This is the X-Force Turbo Downpipe w/High Flow Cat Converter. X-Force designed this downpipe with a larger diameter and with a smooth bend to allow the turbocharger to exhale those exhaust gases without any obstructed interruptions to greatly improve the turbo response and performance. A good downpipe is one of the more popular upgrades in the B58 as the factory downpipe is highly restrictive by design, and with a proper tune, there will be a good amount of power and performance to be gained. 

 X-Force Turbo Downpipe w/High Flow Cat Converter 

SPECS:

• 304 stainless steel construction
• 4-inch inlet size with 3-3/8-inch outlet size
• Built-in 200-cell metallic high-flow catalytic converter
• Euro-style mesh flex bellow
• Direct replacement for your factory downpipe
• Increases both horsepower and torque
• Helps produce an aggressive exhaust note
• Reduces the turbo lag while improving the throttle response

NOTE:

• A proper tune is recommended to maximize the power and potential of this downpipe