Give your Mercedes-AMG a more aggressive exhaust character with the SPOOL Performance Cat-Back Exhaust Systems for the Mercedes-AMG C43 and E43. Engineered for the M276 3.0L Biturbo V6, these performance exhaust systems replace the restrictive factory rear exhaust section with a free-flowing 304 stainless steel construction, while retaining OEM-style exhaust valve control.

Available for both the Mercedes-AMG C43 and Mercedes-AMG E43, the SPOOL cat-back systems are designed to deliver improved exhaust flow, a deeper and fuller exhaust tone, and significantly more aggressive sound when the factory-style valves open. Rather than simply removing the factory mufflers, SPOOL uses a carefully engineered merged mid-section and free-flowing rear mufflers to create a more refined performance exhaust note.

Engineered Exhaust Flow

The SPOOL C43 and E43 cat-back systems use a similar flow philosophy designed around efficient exhaust gas management rather than simply maximizing volume.

Both exhaust banks initially merge into a single Y-collector before splitting back out toward the twin rear mufflers. Merging the exhaust streams earlier and separating them later helps stabilize flow through the center section while evening out exhaust pulses entering the rear mufflers.

The systems also use mandrel-bent tubing, maintaining consistent tubing diameter through the bends and helping minimize restrictions in the exhaust path.

Free-flowing rear mufflers replace the heavily baffled factory units, allowing exhaust gases to move through the system more efficiently while producing a deeper, more performance-oriented tone.

OEM-Style Exhaust Valve Control

One of the defining features of the SPOOL Performance systems is the use of twin valved rear mufflers.

Each rear muffler incorporates its own exhaust valve operated through a vacuum actuator. The valve system is engineered around OEM-style operation, allowing the exhaust character to remain integrated with the vehicle's factory drive-mode behavior.

With the valves closed, the exhaust maintains a more controlled and refined character for normal driving. As the valves open, the system becomes considerably louder, harder, and more vocal, giving the C43 or E43 a substantially more aggressive exhaust presence under spirited driving.

The required valve-control hardware is included with the exhaust system.

Deeper Sound Without a Basic Muffler Delete

The SPOOL cat-back systems are designed to provide more than simply increased exhaust volume.

The carefully engineered merged mid-section and free-flowing mufflers work together to produce a deeper, fuller, and more focused exhaust tone. This approach helps avoid the flatter or excessively droning character that can occur with simple muffler-delete configurations.

The result is an exhaust system that can remain relatively controlled with the valves closed while delivering a much more aggressive AMG-inspired sound when the valves open.

Premium 304 Stainless Steel Construction

Both SPOOL systems are manufactured from 304 stainless steel, providing the durability and corrosion resistance expected from a premium performance exhaust.

Key construction features include:

• Full 304 stainless steel construction
• TIG-welded exhaust components
• Mandrel-bent tubing
• Braided stainless steel flex joints on the front inlets
• Band-clamp slip joints for installation adjustment
• Welded rod hangers designed around factory mounting locations
• Slash-cut stainless steel exhaust outlet tips
• Twin rear muffler configuration

The braided flex sections help accommodate engine movement and thermal expansion, while the adjustable band-clamp connections allow the exhaust system to be properly aligned during installation.

Direct Bolt-On Installation

The SPOOL Performance C43 and E43 cat-back systems are designed as direct bolt-on replacements for the factory rear exhaust section.

Installation uses the vehicle's factory mounting locations and the supplied clamping hardware. No cutting or welding is required, and no permanent modification to the vehicle is necessary.

This also allows the factory exhaust system to be reinstalled if desired.

Installation Advantages

• Direct bolt-on design
• Factory mounting points retained
• Supplied installation hardware
• No cutting required
• No welding required
• No permanent vehicle modifications
• Factory exhaust can be reinstalled

Professional installation is recommended to ensure proper alignment, sealing, and exhaust valve operation.

SPOOL Performance Mercedes-AMG C43 Cat-Back Exhaust

The SPOOL Performance Mercedes-AMG C43 Cat-Back Exhaust is designed specifically for the Mercedes-AMG C43 equipped with the M276 3.0L Biturbo V6.

Its merged mid-section, free-flowing rear mufflers, mandrel-bent tubing, and valved exhaust configuration are designed to improve the C43's exhaust flow and sound while retaining OEM-style valve functionality.

C43 Highlights

• Designed for Mercedes-AMG C43
• M276 3.0L Biturbo V6 application
• Twin front inlets with merged Y-collector
• Twin valved rear mufflers
• 304 stainless steel construction
• OEM-style vacuum-operated exhaust valves
• Free-flowing muffler design
• Braided stainless steel flex joints
• Mandrel-bent tubing
• Factory mounting points
• Direct bolt-on installation
• No cutting or welding required

Product Link: https://x-ph.com/spool-performance-mercedes-amg-c43-catback-exhaust-system/ 

SPOOL Performance Mercedes-AMG E43 Cat-Back Exhaust

The SPOOL Performance Mercedes-AMG E43 Cat-Back Exhaust applies the same performance-focused exhaust philosophy to the larger E43 platform.

Designed for the Mercedes-AMG E43 with the M276 3.0L Biturbo V6, the system replaces the restrictive factory rear exhaust section with a free-flowing 304 stainless steel system featuring twin valved mufflers and a merged center section.

The result is a deeper and fuller exhaust note with substantially increased aggression when the valves open, while retaining a more controlled character when they are closed.

E43 Highlights

• Designed for Mercedes-AMG E43
• M276 3.0L Biturbo V6 application
• Twin front exhaust inlets
• Single merged Y-collector
• Twin valved rear mufflers
• 304 stainless steel construction
• OEM-style vacuum-operated valve control
• Free-flowing muffler design
• Mandrel-bent tubing
• Braided stainless steel flex joints
• Factory mounting locations
• Direct bolt-on installation
• No cutting or welding required

Product Link: https://x-ph.com/spool-performance-mercedes-amg-e43-catback-exhaust/ 

SPOOL Performance: Engineered Value

SPOOL Performance focuses on developing performance components around engineering, materials, and manufacturing efficiency. By optimizing the production process and reducing unnecessary costs, SPOOL is able to offer performance components designed to provide strong value without compromising the underlying product quality.

For Mercedes-AMG C43 and E43 owners looking for a more aggressive exhaust character without resorting to a basic muffler-delete setup, these cat-back systems provide a complete solution combining 304 stainless steel construction, optimized exhaust flow, valved muffler control, and direct-fit installation.

Fitment

SPOOL Performance C43 Cat-Back Exhaust

• Mercedes-AMG C43
• M276 3.0L Biturbo V6

SPOOL Performance E43 Cat-Back Exhaust

• Mercedes-AMG E43
• M276 3.0L Biturbo V6

Always verify the exact vehicle configuration and application before ordering.

Important Legal Disclaimer

These SPOOL Performance exhaust systems are intended solely for closed-course competition or off-road use and are not legal for use on public roads or highways.

The products modify or replace emissions-related equipment and are not compliant with EPA or CARB emissions requirements. Use of these products on vehicles operated on public roads is prohibited.

By purchasing these products, the buyer acknowledges and assumes responsibility for proper use and compliance with all applicable laws and regulations.

Upgrade your Mercedes-AMG C43 or E43 with a SPOOL Performance Cat-Back Exhaust for improved exhaust flow, a deeper and more aggressive exhaust tone, OEM-style valve control, and durable 304 stainless steel construction.