Mercedes C63 AMG S Performance Parts & Tuning Mods

Top Brands For Mercedes C63 AMG S Mods

The Mercedes C63 AMG S is very well supported in the aftermarket, with a wide range of respected brands offering performance parts, tuning upgrades and motorsport components to suit everything from fast road setups to dedicated track builds.

Exterior Styling Upgrades For Mercedes C63 AMG S

To sharpen the road presence of your Mercedes C63 AMG S, you can pick from a range of exterior styling mods including body kits, spoilers, splitters, diffusers, custom grilles and more. These upgrades let you dial in a more aggressive, track-inspired or uniquely personalised look that matches the car’s performance.

Handling & Suspension Upgrades

Upgrading the handling on a Mercedes C63 AMG S is all about getting that big power chassis to feel tighter, more predictable and more confidence inspiring in fast corners. Start with quality tyres and a good alignment, as stickier rubber and correct geometry transform grip and steering feel straight away. Pair this with performance brake pads, uprated discs and braided lines for stronger, more consistent stopping power on road and track, without going straight to a full big brake kit unless you are doing serious track work. From there, suspension tuning really wakes the car up. Lowering springs or adjustable coilovers reduce roll and tidy up the slightly soft, nose-heavy factory feel, while upgraded dampers improve control over bumps and kerbs. Stiffer anti roll bars, a front strut brace and uprated bushes sharpen turn in and stability, helping to tame the C63 AMG S tendency to understeer then snap to oversteer. Doing the upgrades in stages lets you dial in a balance that suits your driving, from fast road use to focused track days.

Frequently Asked Questions about the Mercedes C63 AMG S

What are the best first performance mods for a Mercedes C63 AMG S?

If your C63 AMG S is stock, the most common first upgrades are an uprated panel filter or intake, a freer flowing cat back exhaust system and a quality set of high performance tyres. These three mods sharpen response, improve sound and help you use the V8’s power more confidently.

Many owners also fit lowering springs or coilovers to tidy up the stance and improve handling without ruining comfort. Combined with good wheel alignment, these chassis upgrades make the car feel more planted than any power mod on its own.

Once the basics are sorted, you can look at an ECU remap and supporting hardware like upgraded intercoolers and downpipes for more noticeable gains in horsepower and torque.

How much power can a C63 AMG S gain from a remap or ECU tune?

A well developed ECU remap on the 4.0 twin turbo V8 can deliver a strong bump in torque and a healthy increase in peak horsepower, even on a standard car with the stock intake and exhaust. You mainly feel it in the mid range punch and sharper throttle response rather than just a headline figure.

With supporting mods such as a performance intake, downpipes, better intercoolers and a less restrictive exhaust, you can unlock more of the engine’s potential while keeping intake temps in check. The key is to use a reputable tuner who understands the C63 AMG S platform and can tailor the calibration to your fuel and usage.

Remember that every car is slightly different, so use dyno numbers as a guide only and focus on a smooth, reliable power delivery for fast road or track rather than chasing the biggest number.

Will tuning my C63 AMG S affect reliability or engine life?

A sensible remap and quality performance parts will not automatically make your C63 AMG S unreliable, but they do raise the stress on components, especially turbos, cooling and transmission. Regular servicing with the right oil and genuine or high quality filters becomes even more important once the car is tuned.

Supporting mods like upgraded intercoolers, a good radiator, fresh coils and plugs, and decent brake pads and fluid all help the car cope with extra power, especially if you drive it hard or take it on track. Heat management is a big factor with any tuned turbo engine.

If you stay within realistic power levels, use high octane fuel and work with experienced Mercedes tuning specialists, most owners enjoy reliable performance without serious issues. Pushing for extreme figures, or using bargain basement parts, is where problems usually start.

Does modifying my C63 AMG S void the Mercedes warranty?

Any modification, whether that is a remap, exhaust, intake or suspension kit, can potentially affect your manufacturer or extended warranty. Dealers can refuse warranty claims if they believe an aftermarket part or tune contributed to the failure.

Some owners use removable tuning boxes, but dealers are increasingly familiar with them and may still see logs of higher boost or altered parameters. A proper flash tune is usually better from a performance and drivability point of view, but you should accept that it may impact warranty cover.

If your C63 AMG S is still under warranty, talk to your dealer and your chosen tuner first so you understand the risks. If warranty protection is vital, you may want to stick to cosmetic mods, wheels, tyres and easily reversible changes until the cover expires.

What wheel and tyre sizes work well on a C63 AMG S for road and track?

The C63 AMG S comes with aggressive factory fit alloys, but many owners move to lightweight aftermarket wheels and wider tyres for more grip. A common setup is to retain the standard 19 inch diameter but run slightly wider rims with performance tyres from brands like Michelin, Goodyear or Pirelli.

On a fast road car, aim to stay close to OEM rolling radius and offsets to avoid rubbing and to keep the traction control and ABS happy. If you go significantly wider or lower the car, proper arch clearance checks and alignment are essential.

For track days, a square setup with the same width front and rear can improve balance and rotate the tyres more evenly, though this may need specific offsets and sometimes small spacers. Ask for advice with your exact model year, brake setup and suspension height before ordering wheels.

Is an aftermarket exhaust worth it on a Mercedes C63 AMG S?

An aftermarket exhaust is one of the most popular upgrades on the C63 AMG S, mainly for sound and response. A good cat back system can free up some flow, reduce weight compared to stock and give the V8 a deeper, more aggressive tone without being obnoxious.

Adding sports cats or decat downpipes brings more turbo noise and a bit more performance, but it also increases exhaust volume and may not be road legal in every situation. Always check local MOT and emissions rules before choosing high flow cats or decat pipes.

For daily driven cars, we usually recommend a quality valved system, so you can keep things civil on the motorway and open it up when you want more drama.

What supporting mods should I consider before taking a tuned C63 AMG S on track?

Before chasing more power, make sure the basics are covered. Fresh high temp brake fluid, uprated pads, and good tyres are must haves for any C63 AMG S that will see track use. Many owners also fit braided brake lines and a more track focused wheel alignment for better pedal feel and stability.

For tuned cars, upgraded intercoolers, improved cooling, and possibly an auxiliary radiator help keep intake and oil temperatures under control during repeated hard laps. A baffled sump or oil management solutions can also be worth considering if you are doing a lot of circuit work.

Power is the easy part. Getting the chassis, brakes and cooling right first will make your C63 AMG S quicker, more consistent and far more enjoyable on track days.

Final Thoughts On The Mercedes C63 AMG S

The Mercedes C63 AMG S is already a seriously fast bit of kit, with that muscular V8, rear drive attitude and proper premium feel. Out of the box it delivers big power, a great soundtrack and a grown up cabin that works for daily use as well as weekend blasts. What really makes it special is the character, it feels old school and modern at the same time, with that shove in the back and playful balance when you lean on it. That is exactly why it responds so well to smart tuning and carefully chosen performance parts. On the performance side, the stock car can see intake temps climb when you push on, and the standard exhaust is a bit muted for some owners. Uprated intercoolers, freer flowing intakes, sports cats and cat back systems, combined with a sensible ECU remap, help the C63 AMG S deliver stronger, more consistent power without hammering reliability. Heat management is the big one, so better cooling, quality oil and regular maintenance are just as important as chasing numbers. Done properly, you get sharper throttle response and more flexible torque, while keeping the engine safe for road and track use. Chassis wise, the car is grippy but heavy, and the factory suspension can feel a touch soft and floaty on bumpy B roads, with the rear sometimes struggling for traction. Coilovers or upgraded dampers and springs, along with stiffer bushes and adjustable geometry, really tighten things up and give you more confidence on turn in and corner exit. Bigger brake kits, or quality discs, pads and fluid, deal with fade when you are braking hard again and again. Matching everything with the right wheels and tyres, whether you call them alloys, rims or lightweight track wheels, transforms the way the car puts its power down. Styling and interior tweaks then let you put your own stamp on the C63 AMG S without ruining its everyday manners. Subtle aero, carbon trims, bucket seats or a more focused steering wheel can make the cabin feel like a proper motorsport cockpit while still working for the commute. Put all of this together, and you end up with a C63 AMG S that looks sharper, drives cleaner and feels even more rewarding, yet stays reliable and usable every day. The base car gives you a brilliant platform, the right mix of mods lets you turn it into your own ideal build, whether that is a fast road weapon, a track toy or a refined all rounder that still knows how to misbehave when you ask.