aFe MACH Force-Xp Cat-Back Exhaust

2008–2012 Dodge Challenger 6.1L SRT8 / 6.4L 392

Part #: 49-42028

Overview

The aFe MACH Force-Xp Cat-Back Exhaust system is engineered specifically for the 2008 to 2012 Dodge Challenger equipped with the 6.1L SRT8 or 6.4L 392 engines. Designed to enhance both performance and sound, this exhaust system delivers a significant power boost while preserving the iconic muscle car exhaust note. Ideal for enthusiasts seeking improved horsepower and torque without sacrificing drivability or requiring complex modifications, the MACH Force-Xp system offers a direct bolt-on upgrade that maximizes your Challenger’s potential.

With a focus on quality construction and precise engineering, this cat-back exhaust improves exhaust flow and reduces drone, making it suitable for daily driving as well as spirited performance use. It retains factory exhaust tips and hanger locations, ensuring a clean, factory-like fit and finish.

Key Features

The MACH Force-Xp Cat-Back Exhaust combines advanced design elements and durable materials to deliver measurable performance gains and an aggressive sound profile. Key features include:

• Dyno-proven gains of up to +10 horsepower and +14 lb-ft of torque
• Mandrel-bent 3-inch stainless steel tubing for unrestricted exhaust flow
• Dual high-flow mufflers designed to absorb high-pitched tones and enhance sound quality
• Crossover balance tube that equalizes exhaust pulses, improving flow efficiency and reducing drone
• 100% MIG-welded construction for superior strength and leak-free performance
• Retention of factory exhaust tips for a seamless appearance
• Utilizes all factory hanger locations for hassle-free installation without modifications
• Includes polished stainless steel exhaust tips for a premium look

Construction & Design

The aFe MACH Force-Xp exhaust system is crafted from premium 3-inch mandrel-bent stainless steel tubing, ensuring smooth bends that maintain consistent diameter and maximize exhaust flow. The use of 304-grade stainless steel provides excellent corrosion resistance and long-lasting durability under extreme conditions. All welds are completed using advanced MIG welding techniques, delivering a strong, leak-free seal throughout the system.

The design incorporates a crossover balance tube that plays a critical role in balancing exhaust pulses between the two sides of the system. This innovation not only enhances performance by promoting efficient scavenging but also reduces unwanted exhaust drone, resulting in a more comfortable driving experience without compromising the aggressive muscle car sound.

Performance & Sound

The MACH Force-Xp Cat-Back Exhaust is engineered to unleash the full potential of your Dodge Challenger’s 6.1L or 6.4L V8 engine. Dyno testing confirms gains of up to 10 horsepower and 14 lb-ft of torque, providing noticeable improvements in acceleration and throttle response across the power band. The dual high-flow mufflers deliver a deep, aggressive exhaust note that captures the essence of classic American muscle while eliminating harsh high-frequency tones.

Thanks to the crossover balance tube, the system minimizes exhaust drone, making it suitable for both spirited driving and daily use. The sound is powerful yet refined, enhancing the driving experience without becoming intrusive on longer trips.

Installation & Fitment

This cat-back exhaust system is designed for a direct bolt-on installation using all factory hanger locations, eliminating the need for cutting, welding, or additional modifications. The system retains the factory exhaust tips, allowing for a clean, OEM-style appearance. Installation can typically be completed with basic hand tools and does not require professional assistance, making it an accessible upgrade for enthusiasts and DIY mechanics alike.

Fitment is specific to the 2008–2012 Dodge Challenger models equipped with the 6.1L SRT8 or 6.4L 392 engines, ensuring a perfect fit and optimal performance.

What's Included

• 3-inch mandrel-bent stainless steel cat-back exhaust system
• Dual high-flow mufflers
• Crossover balance tube
• Two polished stainless steel exhaust tips
• OE-style flange and band clamps for leak-free sealing
• All necessary hardware for installation

Ideal For

The aFe MACH Force-Xp Cat-Back Exhaust is ideal for Dodge Challenger owners who want to enhance their vehicle’s performance and sound without compromising reliability or requiring extensive modifications. It suits muscle car enthusiasts looking for a powerful yet refined exhaust tone, daily drivers seeking improved throttle response, and weekend racers who demand measurable horsepower and torque gains.

Emissions Note

This product does not require a CARB Executive Order (EO#), making it compliant for use in states with strict emissions regulations where applicable.

aFe POWER (Advanced FLOW Engineering) offers dyno-proven intake, filtration, and exhaust upgrades aimed at measurable performance gains. The brand’s lineup is geared toward enthusiasts looking for better airflow, improved sound, and durable materials—from cold air intakes to stainless exhaust systems for street and track applications.