Duramax lml Downpipe-Back Race Exhaust displayed on a white background
6.6L Duramax LML Downpipe-Back Race Exhaust | 2011-2015 GMC/ Chevrolet

4" System

$505.00
$786.50 $505.00
SALE 36% Sold out
  • Duramax lml Downpipe-Back Race Exhaust displayed on a white background
1 1
GM Duramax LML (2011 - 2015)

6.6L Duramax LML Downpipe-Back Race Exhaust | 2011-2015 GMC/ Chevrolet

6.6L Duramax LML Downpipe-Back Race Exhaust | 2011-2015 GMC/ Chevrolet

1,723 Google Reviews

SKU:ESSS-GM-11-4

$505.00
$786.50 $505.00
SALE 36% Sold out
Size

Select your vehicle

Choose your vehicle to confirm this product fits your truck

View full details

Vehicle Compatibility

  • Years: 2011-2015
  • Makes: Chevrolet Silverado, GMC Sierra
  • Models: 2500, 3500HD
  • Engine: 6.6L Duramax LML (diesel)
  • Body: Pickup only
Note: This exhaust system is not compatible with Cab & Chassis trucks or newer 2015 models featuring a 3-bolt flange. Always double-check the fitment details before purchasing.

Performance and Application

By removing both the catalytic converter and DPF filter, this system enhances exhaust flow significantly. As a result, you will notice improved fuel efficiency and greater engine power. The larger 4' or 5' stainless steel piping ensures better airflow, reducing exhaust gas temperatures. Moreover, the straight-through design helps maximize flow, making it perfect for off-road and competition use.

Features

This race exhaust system offers several advantages, especially for Duramax owners looking to boost performance:

  • Durable stainless steel piping to withstand harsh conditions
  • Available in 4' or 5' diameters to match different performance requirements
  • OE-style hangers provide an easy, secure installation
  • Straight-through design maximizes exhaust flow, helping the engine perform efficiently
  • No bungs, making this system ideal for off-road applications and competitions

Installation Considerations

This product is intended for off-road use only and requires race tuning to operate correctly and achieve optimal performance. The kit includes all required hardware and clamps for installation. Do-it-yourself installation is possible; however, professional installation and tuning are recommended to ensure proper fitment and correct operation. Depending on your vehicle’s configuration, minor modifications may be required.

Upgrade Your Build

Frequently Added Together

1 4