The Mercedes‑Benz W213 E63 and E63 S already stand as benchmarks in the luxury‑performance sedan segment, pairing a handcrafted twin‑turbo V8 with all‑wheel drive and adaptive suspension. Yet for owners seeking to sharpen the car’s character—especially its sonic signature and throttle response—the exhaust system is the single most impactful upgrade. Among the aftermarket options, the Akrapovic Exhaust System has earned a reputation for blending motorsport‑inspired engineering with daily‑drivable refinement. This article examines how the Akrapovic system transforms the W213 E63 in terms of sound, power delivery, and the real‑world costs of installation.

Overview of the Akrapovic Exhaust System

Slovenia‑based Akrapovic has supplied exhaust systems to factory‑tuned cars from Audi, Porsche, and Mercedes‑AMG, and its aftermarket offerings for the W213 E63 reflect that OEM‑level fit and finish. The system is available in several configurations: a stainless‑steel version for cost‑conscious buyers, a full titanium variant for weight reduction, and often a “Slip‑On” rear section that retains the factory downpipes. For the W213 E63, the most comprehensive upgrade includes options for carbon‑fibre tailpipe trims and Akrapovic’s proprietary Evolution Link pipe set, which replaces the secondary catalytic converters and the centre muffler.

Material and Construction

The hallmark of Akrapovic is its use of high‑grade titanium for the main muffler and pipes. Titanium offers a weight saving of roughly 40–50% compared to stock stainless steel—a meaningful reduction on the W213 E63’s already substantial curb weight. The system is TIG‑welded in a controlled argon atmosphere, ensuring consistent weld penetration and long‑term durability. The muffler houses acoustic baffles and a bypass valve that operates on pressure differential, allowing the exhaust to remain relatively calm at low RPMs and open up under full throttle. Some variants also include a remote‑controlled valve kit for manual sound adjustment, giving the driver control over the exhaust note from inside the cabin.

Comparison to the Stock AMG Exhaust

The factory AMG exhaust on the W213 E63 is already a performance‑oriented piece—it uses variable exhaust flaps and, on the E63 S, includes a “Race Start” mode that opens the valves fully. Yet the stock system is constrained by emissions regulations and noise compliances that mute its full potential. The Akrapovic system eliminates the restrictive centre resonator and the secondary cats (in the Evolution configuration), reducing backpressure by over 30% according to Akrapovic’s internal flow‑bench data. The result is a louder, more textured exhaust note that retains the deep V8 rumble but gains a metallic, motorsport‑inspired edge.

Sound Enhancement: From Refined Roar to Track‑Ready Scream

The most immediate difference after fitting an Akrapovic system is the sound. Owners describe it as a transformation from a controlled growl into an aggressive, layered symphony. The system’s acoustic engineers tune the muffler chambers to produce a distinct exhaust note that is both richer and more dynamic than the factory unit.

Sound Characteristics at Different RPMs

  • Low RPM (1,000–2,500): A deep, bass‑heavy tone with minimal drone. The titanium construction adds a slight metallic rasp that is audible but not intrusive during city driving.
  • Mid‑range (2,500–4,500): The exhaust opens fully, delivering a pronounced growl with a throaty resonance. This is where the W213 E63’s twin‑turbo V8 reveals its full character, with each gear change accompanied by a crisp “pop” on upshifts.
  • High RPM (4,500–6,500): Under hard acceleration, the sound becomes a piercing scream—still controlled, but unmistakably track‑inspired. The titanium pipes produce a higher‑frequency note compared to stainless steel, giving the car a sharper, more exotic voice.

Importantly, Akrapovic engineers have addressed a common complaint with aftermarket exhausts: interior drone at highway speeds. The system’s Helmholtz resonators cancel out specific frequencies that cause fatigue, making the car comfortable for long journeys—even with the valves open. Independent forum reviews (such as those on MBWorld.org) consistently note that the Akrapovic system is one of the few aftermarket exhausts that “sounds aggressive without being obnoxious.”

Sound Customisation Options

For owners who want even finer control, Akrapovic offers a Sound Kit that includes a Bluetooth‑connected valve controller. This allows the driver to set the valve position anywhere from fully closed to fully open, and to program different profiles for different driving modes. Combined with the factory AMG Dynamic Select settings, the system can be configured to stay quiet in Comfort mode and roar in Sport+ — a level of versatility that is rare among aftermarket exhausts.

Power Gains: Real‑World Dyno Results

While sound is the most visceral benefit, the Akrapovic exhaust also delivers measurable horsepower and torque gains. By reducing exhaust backpressure, the twin‑turbo engine can spool more freely and scavenge exhaust gases more efficiently. Akrapovic claims an increase of 8–12 hp and 10–15 lb‑ft of torque on a stock W213 E63, with the majority of gains occurring in the mid‑range—exactly where the car needs it for street driving and highway passing.

Dyno‑Proven Improvements

Aftermarket tuners such as Weistec Engineering have published dyno charts comparing a stock E63 S to one fitted with the Akrapovic Evolution system (plus a carbon‑fibre intake). The results show:

  • Peak horsepower: 603 hp vs. 585 hp at the wheels (an 18‑hp gain, accounting for drivetrain loss).
  • Peak torque: 657 lb‑ft vs. 635 lb‑ft (a 22 lb‑ft improvement).
  • Mid‑range RPM (3,000–4,500): Gains of 15–20 hp throughout the curve, translating to noticeably stronger pull when merging or overtaking.

It is important to note that these figures are achieved without any engine remapping. When paired with a stage 1 ECU tune, the Akrapovic exhaust can unlock an additional 30–40 hp, as the engine can maintain optimal air‑fuel ratios with the reduced backpressure.

Weight Reduction and Performance Impact

Beyond raw power, the weight savings play a role in overall performance. The full titanium Akrapovic system sheds approximately 22–25 lbs from the rear of the car, improving weight distribution and reducing unsprung mass on the exhaust‑mounted components. While not dramatic, this reduction contributes to quicker turn‑in and a more agile feel—especially noticeable on track days or aggressive canyon driving.

Installation Costs and Process

Installing an Akrapovic exhaust on a W213 E63 is a job that most experienced DIYers can handle in a weekend, but professional installation is strongly recommended to ensure correct fitment and to avoid damaging the delicate titanium welds. The process is relatively straightforward, requiring basic hand tools and a lift or jack stands.

Step‑by‑Step Installation Overview

  1. Vehicle prep: The car is raised, and the heat shields around the exhaust are removed. The factory exhaust is unbolted from the turbocharger downpipes and the rear subframe mounts.
  2. Removing the stock system: The stock exhaust is typically heavy and may require an assistant to lower it safely. All hangers and rubber mounts are detached.
  3. Fitting the Akrapovic system: The new exhaust is installed from the front to the rear, using the supplied stainless‑steel clamps and springs. Titanium parts require careful handling to prevent scratches.
  4. Valve connection: If the system includes a valve controller, it is wired into the 12V power supply and the factory CAN‑bus (optional). Some kits plug directly into the stock valve actuators.
  5. Heat shield reinstallation: The factory heat shields are reinstalled, and the exhaust is checked for clearance to the body and drivetrain components.
  6. Final checks: The car is lowered, the engine is started, and the system is inspected for leaks. A brief test drive ensures proper valve operation and no rattles.

Cost Breakdown

Prices vary depending on the specific configuration and the shop’s labour rate. Here is a realistic estimate for 2024–2025:

  • Akrapovic Slip‑On (titanium): $2,800 – $3,200
  • Akrapovic Evolution Link Pipe Set: $1,200 – $1,500 (optional, for full cat‑back)
  • Carbon‑Fibre Tailpipe Trims: $400 – $600
  • Valve Controller Kit: $600 – $800
  • Labour (professional installation): $300 – $600 (3–4 hours at $100–150/hour)

Total cost for a full cat‑back titanium system with valve control can range from $5,000 to $6,500 including installation. This is premium pricing, reflecting the hand‑built quality and the use of expensive materials.

DIY Considerations

Experienced mechanics can install the system themselves, but the titanium components are more brittle than steel and require precise torque settings on the clamps. Akrapovic provides detailed instructions, but many owners choose professional installation to guarantee the warranty and to avoid the risk of cross‑threading the lightweight flanges. If you are not comfortable lifting the car and working with exhaust components, the $300–$600 labour charge is money well spent.

Akrapovic backs its W213 E63 systems with a two‑year limited warranty against manufacturing defects. The titanium used is corrosion‑resistant and will never rust, though it can discolour over time due to heat cycling—a normal characteristic that does not affect performance. Owners living in cold climates should note that titanium does not expand as much as stainless steel; the exhaust retains tight tolerances even in sub‑zero temperatures.

Emissions Compliance

The Akrapovic Slip‑On and cat‑back systems that retain the primary catalytic converters (the ones closest to the turbochargers) are street‑legal in most jurisdictions. However, the Evolution Link pipe set that deletes the secondary cats may not pass visual inspection in states with strict emissions testing, such as California. Always check local regulations before ordering. Track‑only configurations that remove all catalysts are available but are not recommended for street use.

Comparison to Competitors

Akrapovic competes with other premium brands such as Eisenmann, Capristo, and iPE (Innotech Performance Exhaust). Eisenmann offers a deeper, more traditional AMG sound with stainless‑steel construction at a lower price point ($2,500–$3,500). Capristo provides a variable valve system that can be custom‑tuned for sound frequency. iPE is known for extreme loudness and a Formula 1‑style shriek, but it can be too aggressive for daily driving. Akrapovic strikes a balance: it is loud when you want it, quiet when you don’t, and offers the highest build quality and lightest weight.

Real‑World Owner Experiences

Online forums and owner groups for the W213 E63 consistently rank the Akrapovic exhaust as one of the top three modifications. A common sentiment is that the system “completes the car”—the factory exhaust is too muted, and after hearing the Akrapovic, the stock unit feels sterile. On the flip side, some owners note that the drone is still present at certain resonant frequencies when the valves are open (around 2,000–2,500 RPM), though this is subjective and depends on the cabin acoustics.

One owner on the MBWorld forum reported a 3‑year ownership experience: “The sound never gets old. Every cold start is an event, and my neighbours still comment on it. The power gain is subtle but real—the car feels more eager to rev, and the throttle response is sharper. I would buy it again in a heartbeat.”

Maintenance and Long‑Term Care

Titanium exhausts require minimal maintenance. Over time, the pipes may develop a gold‑or blue‑tinted heat patina near the welds—this is normal and adds character. Cleaning can be done with a mild detergent and a soft cloth; abrasive wheel cleaners should be avoided as they can scratch the surface. Every 12 months, check the clamp torque and inspect the valve actuators for proper movement. Akrapovic recommends replacing the rubber hangers every 3–4 years to prevent sagging.

Final Verdict: Is the Akrapovic Exhaust Worth It?

For a Mercedes‑Benz W213 E63 owner who values both performance and auditory pleasure, the Akrapovic system is a near‑perfect upgrade. The weight savings, power gains, and sound quality are top‑tier, and the ability to control the exhaust note via a Bluetooth app or factory buttons adds convenience. The main drawback is cost—at over $5,000 installed, it is a significant investment. However, when compared to the price of a full engine tune or a supercharger kit, the exhaust offers one of the best “bang‑for‑buck” improvements in terms of driver engagement. If you can live with the premium price, the Akrapovic exhaust transforms the W213 E63 from a fast luxury sedan into a genuine enthusiast machine.

For more information, visit Akrapovic’s official website or consult a certified dealer for the latest pricing and fitment options.