MBRP S6032304 4 Inch Filter Back Exhaust

MBRP S6032304 4 Inch Filter Back Exhaust for 2011–2019 Duramax

The MBRP S6032304 4-inch filter back exhaust fits 2011–2019 Duramax LML and L5P trucks. This system replaces the exhaust behind the emissions filter and improves flow while keeping factory emissions components in place.

Because of that, it increases efficiency without modifying emissions equipment.

Filter Back System Design

This system installs after the DPF. Therefore, it maintains emissions compliance while improving exhaust flow and sound.

As a result, the engine moves exhaust gases more efficiently under load.

T304 Stainless Steel Construction

MBRP builds the S6032304 using T304 stainless steel. This material offers strong corrosion resistance and long-term durability in harsh conditions.

In addition, it provides a premium finish that holds up well over time.

Improved Flow and Performance

The 4-inch tubing reduces restriction compared to the factory system. Because of that, exhaust gases exit faster and more smoothly.

You can expect:

• Reduced exhaust restriction
• Improved exhaust tone
• Consistent exhaust flow

Single Side Exit with Polished Tip

This system features a single side exit design that follows factory routing. It also includes a 5-inch mirror-polished T304 stainless steel tip, which adds a clean and finished look.

Built for Proper Fitment

MBRP uses welded hangers to secure the system. As a result, the exhaust stays aligned and stable during operation.

Additionally, the system installs using factory mounting points, which simplifies installation.

Installation Notes

This exhaust installs as a direct fit with basic tools. However, always confirm compatibility with your specific truck before installation.

Warranty Coverage

MBRP backs the Armor Pro series with a lifetime warranty on T304 stainless steel systems. This covers defects in materials and workmanship under normal use.

Fitment

• 2011–2016 Duramax LML 6.6L
• 2017–2019 Duramax L5P 6.6L

Related Parts (Same Platform)

Browse more Duramax upgrades:
https://reviewdiesel.com/product-category/duramax-performance/

Built for Maximum Durability

Factory exhaust systems limit flow and lack long-term corrosion resistance. The MBRP S6032304 improves both while delivering a premium stainless steel system built to last.