The Mercedes-Benz C63 AMG has long been celebrated as a masterful blend of German luxury and raw, naturally aspirated V8 performance. For models equipped with the M156 or M177 engine, the factory output of 469 horsepower already provides thrilling acceleration and a ferocious soundtrack. However, for enthusiasts who crave even more—who want to challenge supercars on track days or simply experience unrelenting thrust on the highway—the ESS Supercharger Kit represents a well-engineered, reliable path to over 700 horsepower. This article details the technology behind the ESS kit, walks through the installation process, analyzes the total cost of the upgrade, and explores the real-world performance gains, so you can decide if this modification aligns with your driving goals.

Understanding the ESS Supercharger Kit

ESS (Extreme Supercharger Systems) has built a solid reputation in the forced-induction market for Mercedes-Benz and other European performance cars. Their supercharger kit for the C63 AMG is a centrifugal design, which differs fundamentally from the positive-displacement (roots or twin-screw) superchargers often seen on American muscle cars. A centrifugal supercharger functions much like a turbocharger driven by a belt: it spins a compressor wheel at high speeds to force air into the engine. This design delivers a linear, progressive power curve that builds boost as engine rpm rises, rather than an instant low-rpm surge. For the C63's high-revving V8, this characteristic is ideal, preserving the engine's natural throttle response while adding substantial top-end power.

Key Specifications

  • Supercharger type: Centrifugal (typically Vortech or ProCharger units re-branded or spec’d for ESS)
  • Boost pressure: 8–10 psi (stock internals capable; higher boost for built engines)
  • Intercooling: Air-to-water charge air cooler system included in the kit
  • Fuel system upgrade: Recommended with larger injectors and an auxiliary fuel pump
  • Tuning: Custom ECU flash provided by ESS or partner tuners

The kit includes all necessary brackets, pulleys, belts, intercooler heat exchanger, hoses, fittings, and a high-flow intake system. The supercharger unit itself is typically a self-contained design with its own oiling system, eliminating the need to tap into the engine's oil galleries. This simplifies installation and reduces risk.

Strengths of the Centrifugal Design for the C63

  • Linear power delivery that preserves drivability in daily traffic
  • High peak horsepower gains (200+ hp at the wheels)
  • Less heat soak compared to roots-style superchargers due to lower parasitic drag
  • Efficient at high rpm, matching the V8’s power band

Installation Process: From Stock to Supercharged

Installing the ESS Supercharger Kit is not a weekend project for a novice mechanic. The complexity is moderate to high, and while the kit is designed to be as bolt-on as possible, professional installation by a shop experienced with forced induction AMG builds is strongly recommended. Anticipate a 30–50 hour labor effort depending on the shop’s familiarity and any additional modifications performed simultaneously.

Pre-Installation Considerations

  • Internal engine condition: The M156/M177 engines are robust, but a compression test and leak-down test are wise before adding boost. High mileage or previously neglected engines may need attention.
  • Supporting modifications: The included fuel system upgrades (injectors and pump) are mandatory. An upgraded heat exchanger and larger intercooler reservoir are recommended for sustained track use. Consider an upgraded radiator and oil cooler as well.
  • Exhaust system: A free-flowing cat-back exhaust (and possibly high-flow catalytic converters or downpipes) will reduce backpressure and allow the supercharger to breathe, maximizing gains. The ESS kit is designed to work with many aftermarket exhausts.
  • Clutch or transmission: For manual-transmission C63s, the stock clutch will likely slip at 700 hp. A stronger clutch or torque converter upgrade is essential.
  • Legal and emissions: Depending on your region, this modification may affect emissions compliance. Check local laws.

Step-by-Step Installation Outline

  1. Preparation and disassembly: Disconnect the battery, drain coolant, and remove the factory intake air box, air filter, and intake ducting. Remove the front bumper and fascia to access the intercooler and heat exchanger mounting locations.
  2. Supercharger mounting bracket installation: The ESS bracket replaces the stock alternator mount and positions the supercharger on the left (driver’s side in left-hand-drive) of the engine. This step requires careful torque of bolts and often the replacement of the alternator’s location to a lower position.
  3. Intercooler and heat exchanger installation: Mount the air-to-water intercooler core in the front of the engine bay, typically replacing the stock intake manifold plenum. The heat exchanger (a separate radiator-like unit for the intercooler system) is mounted in front of the main radiator or in the bumper area. Run coolant lines and fill with a mix of water and coolant or water-methanol for additional knock resistance.
  4. Fuel system upgrades: Install the provided larger fuel injectors (e.g., 80 lb/hr or higher) and the auxiliary fuel pump. This step may require removing the intake manifold, which is a good opportunity to inspect the intake valves for carbon buildup (common on direct injection engines).
  5. Supercharger unit installation: Mount the supercharger to the bracket, install the drive belt (using the included custom pulley on the crankshaft), and connect the oil lines (for self-contained units, simply fill the supercharger with the provided synthetic oil).
  6. Plumbing and electrical: Connect the charge air pipes from the supercharger to the intercooler and from the intercooler to the engine’s throttle body. Connect any vacuum lines for the bypass valve and install the supplied blow-off valve. Wire the auxiliary fuel pump (including a relay and fuse) and, if equipped, the intercooler pump.
  7. Reassembly: Reinstall the factory exhaust manifolds (or aftermarket ones if they are being swapped), reattach the front bumper, and reconnect the battery. Verify all connections.
  8. Tuning: This is the most critical step. The kit includes a base tune file that must be flashed to the ECU using a handheld programmer (often HP Tuners or a dedicated ESS device). A professional dyno tune is highly recommended to optimize air/fuel ratios, timing, and boost levels for your specific fuel quality and modifications. Without proper tuning, the engine risks severe damage.

Total installation time: 30–50 hours for an experienced shop. Do not rush this process; quality of work directly affects reliability.

Cost Breakdown of the ESS Supercharger Upgrade

The total investment for a 700+ hp C63 AMG goes beyond just the supercharger kit. Below is a realistic cost analysis, assuming professional installation and recommended supporting modifications.

Itemized Costs

  • ESS Supercharger Kit (base) – $7,500–$10,000 (price varies by generation C63 and included options; some kits also require a deposit for the supercharger unit rebuild).
  • Installation labor professional shop – $2,500–$4,000 (average rate $100–$150 per hour).
  • Dyno tuning (custom) – $600–$1,200 (on a load-bearing dyno, multiple runs).
  • Supporting fuel system upgrades not in kit – $500–$1,500 (larger injectors beyond what kit ships, or a boost-a-pump).
  • Intercooler heat exchanger upgrade (larger core) – $400–$800 (recommended for track days).
  • Exhaust modifications (cat-back, downpipes) – $1,000–$2,500 (if not already aftermarket).
  • Clutch or torque converter upgrade (if applicable) – $1,500–$3,500 (for manual transmission C63).
  • Oil cooler and radiator upgrades (optional but recommended) – $800–$1,500.
  • Total estimated range – $10,000–$25,000 depending on scope and parts choices.

It is possible to stay on the lower end if the car already has a free-flowing exhaust and if the owner performs the installation themselves (assuming advanced mechanical skills). However, for most buyers, the realistic entry point is around $14,000–$18,000 for a reliable 700 hp setup with professional tuning.

Performance Gains: From 469 HP to Over 700 HP

Factory C63 AMG models have plenty of power, but the ESS supercharger transforms the car into a serious force to be reckoned with. Depending on the specific kit version (e.g., ESS G3 vs. G4 kit for the M156 or the later M177 variant), peak power ranges from 650 to 750 crank horsepower. On a chassis dyno, owners typically see 580–640 wheel horsepower, translating to an ~60–80% increase over stock.

Real-World Acceleration and Track Performance

  • 0–60 mph: Stock is around 3.8–4.1 seconds (depending on transmission and traction). With the ESS kit and sticky tires, times drop to 3.0–3.3 seconds.
  • Quarter-mile: Low 11-second range at 125+ mph is common; some owners on drag radials have run 10.6–10.9 seconds at 130+ mph.
  • Top speed: Electronically limited in most configurations, but the added power allows the car to reach the limiter much faster. Without a limiter, the car can exceed 190 mph.
  • Driving impression: The power delivery is linear and builds aggressively from 4,000 rpm to redline. Throttle response remains crisp, and the supercharger whine adds a mechanical soundtrack that complements the V8 roar.

Dyno Results and Tuning Optimization

Many ESS-tuned C63s produce a peak torque figure of 550–600 lb-ft at the wheels, with the torque curve holding strong past 6,500 rpm. This is a significant improvement over stock, which tends to run out of breath after 6,000 rpm. Custom tuning can optimize the air/fuel ratio to around 11.8:1 on pump gas (91–93 octane) and adjust timing to keep exhaust gas temperatures in check. On race gas or E85, power can go even higher, but fuel system modifications may need to be scaled up accordingly.

Reliability and Maintenance Considerations

Adding 250+ horsepower to a production engine requires increased attention to maintenance and heat management. The M156 and M177 engines are known for their robust bottom end (forged rods and cranks in many iterations), but the cylinder walls and head gaskets become the weak point under sustained boost.

Common Reliability Concerns

  • Heat: The V8 under supercharger load generates significantly more heat. Upgraded oil coolers, additional heat exchangers for the intercooler system, and high-performance coolant are mandatory for track use. For street driving, the basic kit cooling components are usually sufficient.
  • Fuel quality: Using lower octane fuel will cause knock and can destroy the engine. Stick to premium 93 or higher. E85 requires a compatible fuel system.
  • Belt maintenance: The supercharger drive belt should be inspected every 10,000 miles and replaced as needed. A belt slip can cause loss of boost and possible engine damage if the supercharger overspeeds.
  • Oil changes: The supercharger requires its own oil change every 15,000–20,000 miles. ESS provides synthetic oil for this. Engine oil changes should be performed every 3,000–5,000 miles using a high-quality 5W-40 or 0W-40 with high shear stability.
  • Valve train: Direct injection engines can accumulate carbon on intake valves. The increased airflow from the supercharger may worsen this if blow-by oil is not separated well. Catch cans are a worthwhile addition.

With proper maintenance and conservative tuning, many owners have logged 50,000+ miles on their ESS supercharged C63s without major issues. However, any forced induction modification shortens the life of certain components—plan accordingly.

Is the ESS Supercharger Kit Right for You?

This upgrade is not for everyone. It demands a significant budget, a tolerance for increased maintenance, and a willingness to accept that the car will no longer be a subtle daily driver. On the other hand, if you plan on taking your C63 to the track, competing in time attacks, or simply want to surprise exotic car owners on the highway, the ESS kit is one of the most proven and reliable options for achieving 700+ horsepower without resorting to engine internals modifications. The centrifugal supercharger preserves drivability and still returns reasonable fuel economy during normal cruising—around 18–19 mpg highway.

Ideal Candidate Considerations

  • Budget: You must have $15,000+ readily available for the conversion, plus a reserve for future maintenance.
  • Vehicle condition: Low miles, well-maintained C63 with clean engine internals.
  • Gearbox: Automatic cars handle the power better with a torque converter upgrade; manuals require a clutch upgrade that adds cost.
  • Use case: Mostly street driving with occasional pulls—the kit is excellent. For heavy track use (20-minute sessions), invest in the cooling upgrades.
  • Emissions: This kit will not pass a visual inspection in states with strict visual checks. It may pass tailpipe with a proper tune, but it will fail with an OBD-II readiness issue if the tune disables certain monitors.

Conclusion

The ESS Supercharger Kit elevates the Mercedes-Benz C63 AMG from a fast luxury coupe or sedan into a genuine high-powered machine that can humiliate many dedicated sports cars. With a centrifugal design that suits the character of the M156 or M177 V8, a complete bolt-on package, and a well-documented tuning path, the kit delivers a massive power increase while maintaining a level of civility that still allows daily driving. The installation is involved and the cost is significant, but for the right owner, the result is deeply rewarding. Before starting this project, research reputable installers, consider the supporting mods needed for reliability, and budget for proper dyno tuning. The ESS supercharged C63 AMG is a proven and thrilling build—one that respects the car’s heritage while delivering the kind of performance that turns heads and redefines your driving limits.

For further reading and to locate parts or tuning specialists, visit the official ESS website. For real owner experiences, check out the dedicated threads on MBWorld C63 forum and the detailed installation guide on Benz Boost.