What is the primary benefit of the SLP LoudMouth cat-back exhaust?

The main benefit is a significantly more aggressive and louder exhaust sound compared to the factory system. It's designed to let the HEMI engine's natural rumble and roar be heard more clearly.

Does this exhaust system require welding or cutting for installation?

This SLP LoudMouth cat-back system is designed as a direct bolt-on replacement for the factory exhaust components from the catalytic converter back. Typically, no welding or cutting is required for installation.

Will this exhaust system fit my 2011 Dodge Charger?

This specific SLP LoudMouth cat-back exhaust system is designed for the 2008-2010 and 2012-2014 model years of the Dodge Charger. It does not fit the 2011 model year.

SLP 2008-2014 Dodge Challenger/Charger/Magnum/300C 6.1/6.4L LoudMouth Cat-Back Exhaust System

Specifications

Brand: SLP
Part #: D31026
UPC: 871782000768

SLP 2008-2014 Dodge Challenger/Charger/Magnum/300C 6.1/6.4L LoudMouth Cat-Back Exhaust System

Name: SLP 2008-2014 Dodge Challenger/Charger/Magnum/300C 6.1/6.4L LoudMouth Cat-Back Exhaust System
Brand: SLP
Price: 819.20 USD
Availability: InStock

$819.20

On Backorder — Expected to ship by Apr 5, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2008-2014 Dodge Challenger/Charger/Magnum/300C 6.1/6.4L. SLP LoudMouth cat-back exhaust for a more aggressive sound.

Key Features

Fits 2008-2014 Dodge Challenger, 2008-2010 and 2012-2014 Dodge Charger, 2008 Dodge Magnum, and 2008-2010 and 2012-2014 Chrysler 300.
Designed for 6.1L and 6.4L SRT-8 HEMI engines.
The LoudMouth design replaces factory mufflers and resonators for a more aggressive exhaust tone.
Constructed from durable materials for long-lasting performance.
Intended to bolt directly onto the factory exhaust manifolds and catalytic converter.
Part number D31026.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

If you're looking to give your 2008-2014 Dodge Challenger SRT-8 a more aggressive exhaust note, this SLP LoudMouth cat-back system is a solid choice. It's designed to work with the factory exhaust manifolds and is specifically tuned for the 6.1L and 6.4L HEMI engines found in these powerful Mopars. This system replaces the factory mufflers and resonators, allowing the engine to breathe more freely and produce a deeper, louder tone that many enthusiasts crave.

SLP has a long history of building performance exhaust systems, and the LoudMouth design is known for its straightforward approach to increasing sound volume. The system is constructed from durable materials, built to withstand the rigors of daily driving and spirited use. Installation is designed to be a direct bolt-on replacement for the stock exhaust components from the catalytic converter back, meaning no welding or cutting is typically required, making it a manageable project for many DIYers. You'll notice an immediate difference in the sound profile of your vehicle, with a much more pronounced rumble at idle and a more potent roar under acceleration.

This cat-back system is a popular upgrade for owners looking to enhance the auditory experience of their Challenger, Charger, Magnum, or 300C. While it significantly increases the exhaust volume, it's important to note that exhaust sound is subjective. This system is intended for those who want a loud and aggressive sound. It's always a good idea to check local noise ordinances before installing any performance exhaust system.