Best Turbo Inlet Pipe for Audi S5 B9 (2017–2023)
The Audi S5 B9 (2017–2023) is already a weapon with its 3.0T EA839 V6. But if you’re serious about building power —…
The Audi S5 B9 (2017–2023) is already a weapon with its 3.0T EA839 V6. But if you’re serious about building power — whether you’re stock or Stage 1+ — there’s one mod that’s criminally underrated: the turbo inlet pipe.
This article is Part 1 of a two-part deep dive into the best turbo inlet pipe for Audi S5 B9, focused on real airflow gains, drivability impact, top options, and why this mod is a must if you care about performance.
🔥 Why the Turbo Inlet Pipe Deserves Your Attention
Let’s break it down: the turbo inlet pipe is the part that connects your intake to the turbo. Air comes in through your filter, passes through the pipe, and goes into the turbocharger — which compresses it and sends it into the engine.
On the stock S5 B9, that pipe is:
- Plastic
- Narrow
- Crimped with hard bends
- A major restriction at high RPM and boost
You might not think a short pipe matters much — but your turbo disagrees. Once tuned or combined with an intake, the stock inlet becomes a bottleneck. The turbo has to suck air through a straw instead of a high-flow pipe. That means slower spool, more lag, and lost horsepower.
Upgrading your turbo inlet pipe removes that bottleneck — freeing up real performance.
✅ Top 5 Benefits of a Turbo Inlet Pipe on the Audi S5 B9
1. Faster Spool = Better Throttle Response
By opening up the airflow path, the turbo reaches its boost target quicker. This makes your car feel sharper, especially when downshifting or stepping on it in-gear.
2. More Horsepower
On a tuned car, you can gain 5–10 whp just from the inlet pipe. It’s not huge alone, but it adds up — especially when paired with intake and intercooler upgrades.
3. Louder Turbo Sound
You’ll hear more turbo whistle and spool, especially at partial throttle. It gives your S5 that tuner feel without needing a full exhaust.
4. Better Support for Stage 2 and Beyond
If you’re planning to go further with mods — hybrid turbos, ethanol, etc. — a restrictive turbo inlet can hold you back. This mod future-proofs your airflow.
5. OEM Fit, Plug-and-Play Install
All major brands (IE, 034, Eventuri) design their pipes to fit perfectly in the stock location with no extra tuning or modification needed.
🛠️ Install Guide: How Hard Is It?
One of the best things about this mod is how easy it is to install. You can do it in your garage with basic tools.
Tools Needed:
- T25 Torx driver
- Flathead screwdriver
- Pliers
- A flashlight (tight engine bay)
Time Required: 20–45 minutes
Tuning Required: No
CELs/Issues: None if installed properly
Steps (general):
- Disconnect the intake from the inlet pipe
- Remove the mounting bracket bolt(s)
- Twist and pull the factory plastic pipe off the turbo
- Install new inlet pipe, align to turbo, and secure bracket
- Reconnect intake system
- Double-check for tight seals before driving
Tip: Some pipes come with new O-rings or clamps — always use the supplied hardware if included.
🏆 Top Turbo Inlet Pipes for Audi S5 B9 (Part 1 Picks)
We’re starting with two of the most trusted and best-performing options in the market: Integrated Engineering and 034Motorsport.
🔩 1. Integrated Engineering Turbo Inlet Pipe
🔗 Buy on Amazon
🔗 View on IE Website
Material: CNC-machined aluminum
Internal Diameter: Oversized (66mm taper)
Compatible With: Stock or IE intake
Price: ~$225–$250
What Makes It Special:
IE’s design is all about smooth, high-volume airflow. It’s engineered to eliminate airflow turbulence and match up perfectly with their high-flow intake — though it also fits stock setups.
Dyno-Proven Gains:
IE has shown a +10hp gain with this pipe paired with their intake and a tune. Even standalone, it makes a noticeable difference in response and turbo spool.
Pros:
✔ Proven fit and finish
✔ Real power gains
✔ Great customer support
✔ Works perfectly with IE tune
Cons:
✖ A bit pricier than AliExpress options
✖ Best paired with IE parts for full effect
🔩 2. 034Motorsport Turbo Inlet Pipe
🔗 Buy on Amazon
🔗 View on 034 Website
Material: Billet aluminum
Design: CFD optimized
Compatible With: Stock or 034 intake
Price: ~$220–$240
What Makes It Special:
034’s inlet is built with tight tolerances and an aggressive taper for optimized air velocity. It’s also tested extensively on their in-house dynos, and tuned to work seamlessly with their Stage 1 and Stage 2 kits.
User Reviews Say:
- Throttle response improvement is immediately noticeable
- Sound is slightly more aggressive
- No installation drama at all
Pros:
✔ Slick billet aluminum construction
✔ OEM-style mounting
✔ Supports high boost builds
✔ Strong brand reliability
Cons:
✖ Not as widely compatible outside 034 ecosystem
✖ Slightly narrower than IE pipe
🔗 Internal Resource Shoutouts
If you’re running an S5 B9 and serious about building performance, don’t miss these mod guides:
- 🔥 Best Stage 1 Tune for Audi S5 B9 – Full Comparison
- 🌀 Best Intake for Audi S5 B9 – Flow, Sound, Power
- 💨 Best Exhaust for Audi S5 B9 – RS7 Vibes
Pairing a turbo inlet pipe with the mods above is how you turn your B9 S5 from a quick car into a fast one.
💸 Budget Inlet Pipes – Are They Worth It?
Let’s be real: not everyone’s trying to ball out with a $300 billet pipe. Some of us just want boost noises and quicker throttle response for less than the cost of dinner at Nobu.
🔩 AliExpress Turbo Inlet Pipe
You can find aluminum or silicone turbo inlet pipes for the Audi S5 B9 on AliExpress for $60–$100. Some of them are knockoffs of IE or 034 designs, and others are universal-style fits with mixed reviews.
Pros:
- Cheap (no brainer if you’re on a budget)
- Usually includes clamps/gaskets
- Plenty of colors (for those flashy bay builds)
Cons:
- Inconsistent quality control
- May require some fitting or sanding
- Zero brand backing or warranty
Verdict:
If you’re a confident DIYer and don’t mind minor hiccups, you can still unlock airflow gains and sound for a fraction of the cost. Just read reviews and check seller ratings before pulling the trigger.
🧊 Carbon Fiber Inlets – Power Meets Aesthetics
You want it all: performance, style, weight savings, and something that makes people go “whoa” at Cars and Coffee.
🔩 Eventuri Carbon Turbo Inlet Pipe
Eventuri’s turbo inlet is an art piece. It’s designed to pair with their carbon fiber intake system for the B9 3.0T platform.
Pros:
- Extremely lightweight
- Matches Eventuri intake perfectly
- Killer engine bay presence
Cons:
- Crazy expensive (over $300)
- Gains are tied closely to Eventuri’s system
- Overkill if you’re staying stock
Verdict:
If your S5 B9 is already tuned and breathing through an Eventuri intake, this is a no-brainer. If not, it’s a flex piece — beautiful, but not essential.
🧪 Airflow Science – What Does a Turbo Inlet Actually Do?
Let’s nerd out for a second. The turbo inlet pipe is the first point of airflow restriction before your turbo. Air comes in through the intake, passes through this pipe, and spins the turbo. Any restriction here causes the turbo to work harder and longer — which means slower spool, higher temps, and less power.
Here’s what happens when you upgrade:
- Faster boost response = more torque earlier in the rev range
- Less strain on the turbo = better long-term reliability
- More consistent air delivery = smoother throttle and more stable tuning
- Slight HP bump = usually 5–10whp with a tune and intake
It’s not about huge dyno numbers. It’s about efficiency. And when your car breathes better, it moves better — period.
⚙️ How It Feels in Real Driving
So, you install the best turbo inlet pipe for Audi S5 B9 — what now?
Here’s what you’ll notice:
- Snappier response when you blip the throttle
- Cleaner turbo spool and more audible whistle
- Improved low-end torque feel
- Slightly louder intake noise, especially with windows down
- With a tune, the car feels more eager, like it’s not choking on its own breath
No CELs, no rough idles, no tuning drama. It’s one of the safest mods to throw on — and it makes a big impact when combined with your intake and software.
🔁 What to Pair With Your Turbo Inlet Pipe
Here’s how to stack mods for compounding gains:
| ✅ Mod | 🔥 Why It Works With a Turbo Inlet |
|---|---|
| High-Flow Intake | Removes restriction before the inlet, feeds it better air |
| ECU Tune (Stage 1 or 2) | Makes use of increased flow, raises boost targets |
| Intercooler Upgrade | Keeps air dense and cool after compression |
| Heat Exchanger | Lowers intake temps and increases timing efficiency |
| TCU Tune | Improves shifting to better handle the newfound torque |
This isn’t a standalone magic mod. It’s a power piece of your full puzzle. Stack it smart and you’ll feel every piece clicking together.
❌ Common Mistakes You Gotta Avoid
Even something simple like a turbo inlet pipe can go sideways if you’re not careful:
A. Buying One That Doesn’t Fit
Some AliExpress options aren’t built with tight tolerances. Look for ones that specifically fit the EA839 3.0T engine in the S5 B9.
B. Not Replacing the O-Ring
If your kit doesn’t come with a fresh O-ring, grab one. Old ones cause leaks and boost loss.
C. Over-tightening the Pipe
You don’t need gorilla hands. Just snug, not stripped. Aluminum cracks if you overdo it.
D. Expecting 30HP Gains
You’ll feel the mod, but don’t expect it to turn your S5 into an RS6. It’s about flow support, not power inflation.
🏁 Final Verdict: What’s the Best Turbo Inlet Pipe for Audi S5 B9?
Let’s wrap this up with simple recommendations based on your budget and goals:
| Your Situation | Best Pick |
|---|---|
| I want proven gains with tune & intake | Integrated Engineering |
| I run a full 034 Stage 2 setup | 034Motorsport |
| I’m broke but still want turbo whistle | AliExpress aluminum |
| I care about engine bay looks & run Eventuri | Eventuri Carbon |
Best Overall Pick:
👉 IE Turbo Inlet Pipe — balances performance, price, and fitment the best for most owners.
🔗 Where to Buy
| Site | Link |
|---|---|
| Amazon | Top options from IE & 034 |
| AliExpress | Budget turbo inlets |
| GermanCarMods Blog | Full tuning guides |
| 034Motorsport | 034 official store |
| IE Performance | Direct from IE |