MBRP 4 Inch Filter Back Single Side Exit Exhaust System

The MBRP 4 Inch Filter Back Single Side Exit Exhaust System is a bolt-on performance exhaust for diesel trucks. It replaces the restrictive factory exhaust from the diesel particulate filter (DPF) back with larger-diameter 4 inch tubing. The single side exit routes exhaust out the side of the vehicle. Depending on the model, this is also called a DPF-back, filter-back or turbo-back style system, and it is a popular upgrade for owners who want better flow and a deeper, more aggressive tone.

Key Features:

• 4 inch filter-back design that replaces the stock exhaust behind the particulate filter
• Single side exit configuration
• Mandrel-bent tubing that keeps the pipe diameter consistent through bends for smooth exhaust flow
• Fully sealed tubing construction that helps resist seam rust-through
• Built to the same specifications as MBRP's Pro Series line
• Designed for bolt-on installation with common hand tools
• Exhaust tips are sold separately, so you can choose your own

MBRP builds these systems for a good balance of value, durability and performance. Material options vary by system, so check the individual part number for the exact material and warranty.