The W213 E63 AMG – A Performance Benchmark

Mercedes-AMG’s W213 E63 S rewrote the rulebook for executive-performance sedans. Its hand-built 4.0-liter twin-turbo V8 (M177) produces 603 hp and 627 lb-ft of torque in the S variant, launching the car to 60 mph in just 3.3 seconds. Even the base E63 delivers 563 hp, making it one of the most capable four-doors ever produced. Yet for many owners, that level of performance is only the starting point. The aftermarket has responded with a wide spectrum of upgrades, ranging from modest intake modifications to full-blown forced-induction overhauls. Understanding the cost, labor, and real-world gains of each option is essential before committing to a build. This analysis breaks down the price of power for the W213 E63, from the $200 drop-in air filter all the way to $15,000 supercharger systems.

Air Intake Upgrades – The Foundation of Airflow

Improving the engine’s ability to breathe is the most cost-effective way to unlock subtle gains in throttle response and power. For the M177 V8, two primary intake paths exist: drop-in performance air filters and full cold-air intake systems. Drop-in filters from manufacturers such as BMC or K&N replace the factory paper elements and cost between $200 and $400. They increase airflow by 15–25 percent while providing reusable, washable service life. Gains are modest — typically 10–15 hp at the wheels — but the improved induction sound and immediate pedal response are noticeable.

Full cold-air intake kits (like Eventuri or MST Performance) range from $600 to $1,200. These systems replace the entire intake tract with larger-diameter tubes, higher-flow filters, and heat shields that isolate cooler air. On a tuned E63, a cold-air intake can contribute 20–30 hp when combined with software updates. Labor for installation is minimal — a skilled owner can complete the job in under two hours, but shop rates of $100–$150 per hour add $200–$300 if professionally installed. For most enthusiasts, starting with a $300 air filter upgrade provides an excellent value proposition before moving to more expensive modifications.

ECU Tuning and Software Remapping – Unlocking Latent Power

The W213 E63’s ECU is calibrated from the factory for reliability, fuel economy, and emissions compliance, leaving significant headroom. A simple stage 1 tune via a handheld programmer or OBD-II flash typically costs $700–$1,200 and yields 80–120 hp and 100–130 lb-ft of torque gains. Tuning shops like Renntech and Eurocharged offer custom files that adapt to the vehicle’s fuel quality and modifications. Prices for a basic tune range from $500 to $1,500 depending on the tuner’s reputation and whether it includes multiple maps (e.g., 93 octane, 100 octane, valet mode).

Custom remote tuning is another option, where a tuner logs the vehicle’s data via a cable and refines the calibration through several iterations. This service runs $1,000–$2,500 and is essential for modified cars with downpipes, intakes, or upgraded turbos. The results are often superior to off-the-shelf files because the tune is tailored to the specific combination of hardware. Many owners opt for a stage 1 tune first; it is the single highest horsepower-per-dollar upgrade available, transforming the E63’s character while retaining full drivability and factory-like cold starts.

Exhaust Systems – Audible Performance

An exhaust upgrade serves dual purposes: it reduces backpressure to free up power and tailors the exhaust note. Cat-back systems, which replace the piping from the catalytic converters rearward, cost $1,200–$3,500. Brands like Milltek, Akrapovic, and Remus produce systems in stainless steel or titanium, with the latter commanding a premium. Gains from a cat-back alone are modest — 10–15 hp — but the weight reduction (especially with titanium) can improve handling.

For more aggressive systems, owners often replace the downpipes (the sections containing the catalytic converters). High-flow catted downpipes range from $1,000 to $2,000, while catless downpipes are slightly less expensive but will trigger a check engine light without a tune. Combined with a cat-back exhaust, the full system can add 40–50 hp, significantly enhance turbo spool, and produce a deep, aggressive sound under load. Installation is labor-intensive, often requiring 4–6 hours of shop time, adding $400–$900 to the total cost.

Turbocharger Upgrades – Serious Boost

The M177 engine uses twin-scroll turbochargers that are already responsive, but they are a limiting factor for those seeking over 700 hp. Two approaches exist: upgrading the existing turbos with billet compressor wheels and ported housings (hybrid turbos) or replacing them with larger units. Hybrid turbo upgrades from companies like Pure Turbos or Weistec cost between $3,000 and $6,000 for the pair, excluding installation. When combined with supporting modifications (fuel system, intercooler, tune), they can support 800–900 hp.

Full replacement turbo systems, such as those with larger compressor covers and upgraded wastegates, range from $6,000 to $8,500. Installation is substantial — 15–20 hours of labor — because the turbos are mounted in the V‑bank of the engine, meaning the intake manifold and many ancillaries must be removed. Shop rates push total cost to $10,000–$12,000 or more. However, the reward is a linear, relentless surge of power that transforms the E63 into a genuine supercar rival. A well-sorted turbo upgrade can push the quarter-mile into the 9‑second range with the right traction.

Supercharger Kits – The Ultimate Forced Induction

Though less common on the M177 platform than on older AMG V8s, centrifugal supercharger kits are offered by a few specialists, including Weistec Engineering. These kits mount a supercharger unit (often a Vortech or ProCharger head unit) driven by a belt from the crankshaft, providing boost independent of exhaust gas flow. Prices for a complete supercharger system range from $10,000 to $15,000, and they include the supercharger bracket, intercooler, larger injectors, fuel pump upgrades, and a custom tune.

Installation labor adds $3,000–$5,000, bringing the total investment close to $18,000–$20,000. The upside is massive: power levels above 900–1,000 hp are achievable on pump fuel, with instant throttle response and no turbo lag. The downside includes additional heat management requirements and the need for upgraded driveline components (clutches, transmission, driveshaft) to handle the torque. Because supercharger kits are rare for the W213, sourcing and tuning typically require working directly with a select number of builders. For those who want a track-capable weapon that can also return highway fuel economy in comfort mode, a supercharger represents the ultimate — and most expensive — upgrade path.

Suspension and Handling Modifications

Power is only half the equation; extracting performance from the chassis is equally critical. The W213 E63 S comes standard with air suspension and adaptive damping, which balance comfort and cornering. Many owners find the body control adequate for street use but lacking for track work. Lowering springs, costing $300–$800, drop the ride height by 0.8–1.2 inches, reducing the center of gravity and improving steering response. They retain the factory air struts but may shorten their lifespan if the drop exceeds the manufacturer’s limits.

Coilover kits, such as those from KW or Bilstein, range from $1,800 to $4,000 and fully replace the strut assemblies. They offer adjustable compression and rebound damping, as well as ride height adjustment independent of spring preload. For serious track use, coilovers dramatically reduce body roll and improve tire contact patch management. Upgraded sway bars (front and rear) cost $500–$1,500 and complement either springs or coilovers by further reducing roll without sacrificing ride quality. Installation for springs is around $600–$1,000; coilovers require 4–6 hours of labor ($400–$900). A comprehensive suspension upgrade transforms the E63 from a fast grand tourer into a precision cornering tool.

The table below organizes all discussed upgrades by category and price range. Costs are estimates for parts only; labor can add 20–40 percent depending on complexity.

  • Air Intake: Drop-in filters $200–$400 | Cold air intakes $600–$1,200
  • ECU Tuning: Basic flash $500–$1,200 | Custom remote $1,000–$2,500
  • Exhaust: Cat-back $1,200–$3,500 | Downpipes $1,000–$2,000
  • Turbo Upgrades: Hybrid twins $3,000–$6,000 | Full replacement $6,000–$8,500
  • Supercharger Kit: $10,000–$15,000 (parts only)
  • Suspension: Lowering springs $300–$800 | Coilovers $1,800–$4,000 | Sway bars $500–$1,500

For a logical build path that maximizes performance per dollar, start with a stage 1 tune and drop-in filters (approximately $1,000 total). Next, add a cat-back exhaust for sound and an additional 10–15 hp. If the goal is 700–750 hp, high-flow downpipes and a custom tune are the next steps ($2,500–$4,000). For 800+ hp, hybrid turbochargers become necessary, bringing the total to $7,000–$10,000 in parts. Finally, address suspension to put the power down – a set of coilovers and sway bars for about $3,000. The supercharger route remains an outlier for extreme builds exceeding 900 hp and requires a budget exceeding $20,000 including supporting modifications.

Conclusion – Finding the Right Balance

Owners of the W213 E63 are spoiled for choice when it comes to extracting more performance from an already formidable machine. From a simple $200 air filter swap that enhances induction sound to a full $15,000 supercharger system that redefines the car’s capabilities, the aftermarket offers solutions for every ambition and budget. The key is matching the upgrade to the intended use – street enjoyment, drag racing, or track lapping – and accounting for the cascading costs of supporting modifications and labor. By prioritizing the upgrades that deliver the greatest returns first (tuning and intakes) and methodically adding power-adder components, enthusiasts can build a W213 E63 that delivers supercar-slaying performance without unnecessary expense. Always consult with reputable tuners and use quality parts to ensure reliability remains intact – even a 1,000 hp AMG can be a daily driver if built correctly.