MBRP S6033AL 4 Inch Filter Back Exhaust

MBRP S6033AL 4 Inch Filter Back Exhaust for 2011–2019 Duramax

The MBRP S6033AL 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 altering 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 pushes exhaust gases out more efficiently during daily driving or towing.

Aluminized Steel Construction

MBRP builds the S6033AL using heavy-gauge aluminized steel. This material keeps the system affordable while still providing solid durability.

In addition, it performs well in moderate climates and typical driving conditions.

Dual Outlet Single Side Exit

This exhaust features a dual outlet design on a single side exit. Because of that, it delivers a more aggressive appearance without changing the factory routing.

It also includes a 5-inch outlet tip to complete the look.

Improved Flow and Sound

The larger 4-inch tubing reduces restriction compared to the factory exhaust. Therefore, exhaust gases exit faster and more smoothly.

You can expect:

• Reduced exhaust restriction
• Improved exhaust tone
• Better overall flow

Built for Proper Fitment

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

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

Installation Notes

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

Warranty Coverage

MBRP backs the Armor Lite series with a 3-year warranty on aluminized 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/
https://reviewdiesel.com/pc/duramax/2011-2016-duramax-lml-parts-accessories/

Built for Everyday Performance

Factory exhaust systems limit flow and mute sound. The MBRP S6033AL improves both while keeping the system simple, durable, and budget-friendly.