Audi

Best Resonator Delete Kit for Audi S5 B8.5 (2013–2017)

Free up your exhaust flow, amplify your tone, and unlock that signature 3.0T bark. Introduction: The Sound That’s Hiding Underneath The Audi…

Free up your exhaust flow, amplify your tone, and unlock that signature 3.0T bark.

Introduction: The Sound That’s Hiding Underneath

The Audi S5 B8.5 is a masterpiece of understated performance. Its supercharged 3.0-liter V6 pulls like a freight train, especially when tuned—but from the factory, the sound doesn’t always match the muscle.

Part of the blame? The massive, suitcase-sized center resonator tucked beneath the car. Designed to quiet down midrange frequencies, it robs the exhaust of that snarling, crackling character you’d expect from a 330+ horsepower coupe.

If you want your S5 to sound like it means business—without going full straight pipe—a resonator delete is one of the simplest and most affordable mods you can do. This guide breaks down the best resonator delete kits for the B8.5 S5, including install tips, sound expectations, and links to Amazon, AliExpress, and GermanCarMods resources.

What Does a Resonator Delete Actually Do?

Let’s keep it simple.

  • Removes the center resonator, which sits between the downpipes and rear mufflers
  • Replaces it with straight or X-pipe tubing, reducing restriction and weight
  • Loudens the exhaust, especially under acceleration and high RPM
  • Adds rasp, bark, and crackles—the good kind

This isn’t just a noise mod. A proper resonator delete improves exhaust flow, which can slightly help throttle response and free up a few horsepower (especially when paired with downpipes).

Key Benefits:

  • 🔊 Deeper tone
  • 💥 More aggressive sound under load
  • 🏋️ Saves weight
  • 💸 Costs under $300 with install
  • 👷 Bolt-on or weld-on options

Top 5 Resonator Delete Kits for Audi S5 B8.5

Let’s get straight to the point. Below are the best kits we’ve found—based on fitment, sound quality, ease of install, and material construction.

1. ECS Tuning X-Pipe Kit – OEM Fit, Clean Sound

ECS Tuning offers a pre-bent X-pipe resonator delete kit designed specifically for the B8/B8.5 chassis. It replaces the giant factory resonator with mandrel-bent 2.5” stainless tubing, including all clamps and hardware.

  • ✅ Plug-and-play fitment
  • ✅ X-pipe design adds smooth tone and flow
  • ✅ Full bolt-on (no welding required)
  • 🔊 Sound: Deep, refined, no excessive drone

If you want a clean install and a more exotic tone, this kit is the top pick.

🔗 Buy ECS X-Pipe Kit – ECS Tuning

2. AWE Tuning Resonator Delete Kit – Track Tested

AWE offers a Track-to-Touring conversion kit that effectively deletes the center resonator when converting systems. The kit includes high-flow tubing and heavy-duty clamps, and it’s built to pair with their Touring or Track exhaust.

  • 🔧 Perfect if you’re already running AWE downpipes or catback
  • 🔊 Slightly raspier tone than ECS
  • ✅ Polished stainless steel tubing
  • ❗ More aggressive cold start and part-throttle burble

This is a premium option for those already in the AWE ecosystem—or planning to be.

🔗 Buy AWE Resonator Delete Kit – AWE Tuning

3. Amazon Universal X-Pipe Kit – Budget Friendly, Custom Fit

If you’re handy with a welder (or have a local shop), Amazon sells universal X-pipe delete kits that work perfectly with the B8.5 chassis. You’ll need to cut and weld them into place, but the result is nearly identical to premium kits—for half the price.

  • 💰 Usually under $100
  • 🔩 Comes with clamps or weld-in ends
  • 📐 May require trimming or minor adjustment
  • 🧰 Ideal for custom exhaust setups

Just make sure to buy 2.5” diameter tubing to match your OEM midpipe.

🔗 Buy Resonator Delete Kit – Amazon

4. AliExpress Mandrel-Bent Pipes – Cheap but Risky

Believe it or not, AliExpress has multiple vendors offering resonator delete kits or pre-bent exhaust tubing. Build quality varies, and shipping may take weeks, but if you’re on a tight budget, it’s an option.

  • 🔧 Steel or stainless options
  • 💰 Kits for under $75 shipped
  • ❓ Unknown fitment tolerance
  • ⚠️ No warranty or brand backing

If you’re going this route, plan on doing your own measuring and welding.

🔗 Search “Audi S5 3.0T exhaust pipe” – AliExpress

5. Local Custom Shop Fabrication – The Tailored Solution

Sometimes the best option isn’t a kit at all—it’s a quick visit to your local exhaust shop. Most performance muffler shops can cut out your resonator and weld in straight pipe or X-pipe tubing for $150–$250 total.

  • ✅ Perfect fit every time
  • 🎧 Custom tone control (can choose straight vs X-pipe)
  • 🔥 Often better weld quality than bolt-on kits

Ask for mandrel-bent 304 stainless steel and have them retain OEM hanger points.

Sound Expectations – What It Actually Sounds Like

You’re probably wondering how loud it really is. Here’s what to expect after the resonator delete:

Under Normal Driving:

  • Deeper tone at idle
  • More audible throttle blips
  • Subtle cabin drone at 1,800–2,200 RPM (varies by setup)

Under Load / WOT:

  • Pronounced supercharger whine
  • Crackles on upshifts (with DSG tune)
  • Sharper exhaust bark at high RPM

Cold Starts:

  • Louder than stock, but not obnoxious
  • Expect neighbors to raise eyebrows—especially with catless downpipes

Straight Pipe vs X-Pipe – Which One Should You Choose?

This comes down to tone preference.

Straight Pipe:

  • Louder
  • More rasp
  • Slightly more drone
  • Better for full bolt-on builds

X-Pipe:

  • Smoother, deeper tone
  • Balances airflow between banks
  • Less rasp, less drone
  • Best for daily drivers

If you’re running stock downpipes and mufflers, both will sound tame. If you’re on Stage 2 with downpipes and an aftermarket rear section, the X-pipe is the better daily choice.

Does It Affect Performance?

Yes—marginally. Removing the center resonator can reduce backpressure and improve flow.

Estimated Gains:

  • ✅ +5–8 horsepower
  • ✅ Better midrange throttle response
  • ✅ Weight savings (~10–15 pounds)

Combined with an intake and tune, it helps the motor breathe cleaner through the entire rev range.

Installation Tips & Tools

What You Need (for bolt-on kits):

  • Jack and jack stands or ramps
  • 13mm and 15mm socket set
  • Exhaust hanger tool or pry bar
  • WD-40 or silicone spray
  • Time: 1–1.5 hours

For weld-on:

  • Exhaust tubing cutter
  • MIG/TIG welder or access to a shop
  • Expect ~1.5–2 hours shop time

Before cutting anything, test fit the new pipes and confirm clearance around the driveshaft and chassis brace.

Best Mods to Pair It With

To get the most out of your new sound, pair your resonator delete with these mods:

Final Verdict: Worth Every Penny

A resonator delete is the kind of mod you notice every single day. It’s not about chasing dyno numbers—it’s about connection. It wakes up your car’s voice, reminds you you’re driving something special, and does it without destroying your wallet.

Whether you go ECS, AWE, Amazon, or full custom, this mod punches way above its price point in fun, sound, and satisfaction.

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