+19 HP. 37% MORE FLOW.

The iE Polymer Air Intake System gives your B9 or B9.5 S4 or S5 real airflow gains with a factory-like install. Up to 19 HP and 21 ft-lbs on a tuned engine, 37% more flow than the factory airbox, and lower intake temps, without giving up style or quality.

+19 HP. 37% MORE FLOW.

ONE-PIECE POLYMER AIRBOX

A rotomold process lets us build complex shapes and angles into a single-piece airbox with maximum internal volume and smooth flow. The result is consistent wall thickness, strong corners and excellent heat resistance, in an intake that costs less without cutting corners.

ONE-PIECE POLYMER AIRBOX

BUILT-IN VELOCITY STACK

Our motorsport velocity stack smooths the transition from the 5 inch filter to the turbo inlet. Less drag, less turbulence, more power.

BUILT-IN VELOCITY STACK

HIGH-FLOW PRESSURE ZONES

Ram air comes in from the grille, and extra demand is supplied through the filter plate louvers in the low-pressure zone. You get the flow of an open filter with protection from hot under-hood air, at any power level.

HIGH-FLOW PRESSURE ZONES

ADD THE TURBO INLET

The optional cast turbo inlet keeps the path the largest it can be from the airbox to the turbo. Together with the intake, flow goes from 37% to 61% over stock. Add it now in the BUY NOW options or later.

ADD THE TURBO INLET

HYBRID TURBO READY

The intake and inlet bolt straight up to TTE and Pure hybrid turbos with CNC machined, o-ring sealed adapters that never neck down the flow. This setup runs on the world-record 9-second B9 S4 with a TTE810. Adapter rings are sold separately.

HYBRID TURBO READY

TURN UP THE FUN

The velocity stack, pressure zones and big internal volume let turbo spool, throttle and diverter sounds through, giving your S4 or S5 the under-hood sound of a real sports car.

TURN UP THE FUN

POWER TESTING

Countless revisions, flow bench testing, dyno runs and real-world verification.

UP TO 61% MORE FLOW

UP TO 61% MORE FLOW

Flow bench results for the stock intake, the iE intake, the iE intake with the iE inlet, and the iE intake and inlet with a hybrid turbo adapter.

TESTED IN HOUSE

TESTED IN HOUSE

Every number here comes from our own flow bench, back to back against the factory parts.

FLOW BENCH RESULTS

Pressure Drop Airflow
-5 in/H2O
  • Stock intake: 131 CFM
  • iE intake + stock inlet: 149 CFM
  • iE intake + iE inlet: 180 CFM
  • With hybrid adapter: 230 CFM
-10 in/H2O
  • Stock intake: 191 CFM
  • iE intake + stock inlet: 213 CFM
  • iE intake + iE inlet: 258 CFM
  • With hybrid adapter: 301 CFM
-15 in/H2O
  • Stock intake: 238 CFM
  • iE intake + stock inlet: 263 CFM
  • iE intake + iE inlet: 319 CFM
  • With hybrid adapter: 370 CFM
-20 in/H2O
  • Stock intake: 278 CFM
  • iE intake + stock inlet: 306 CFM
  • iE intake + iE inlet: 370 CFM
  • With hybrid adapter: 429 CFM
-25 in/H2O
  • Stock intake: 309 CFM
  • iE intake + stock inlet: 343 CFM
  • iE intake + iE inlet: 416 CFM
  • With hybrid adapter: 499 CFM
-30 in/H2O
  • Stock intake: 344 CFM
  • iE intake + stock inlet: 376 CFM
  • iE intake + iE inlet: 457 CFM
  • With hybrid adapter: 545 CFM

INSTALL GUIDE

Difficulty

photosEasy

Time

photos 20-45 minutes

Download Pdf

Enjoy a quick and hassle-free DIY install. Basic hand tools are all that is needed for this one. You got this.

WE GOT YOU

Have questions about tuning your Audi with iE? Our in-house team of Mod Gurus are serious motorheads with big brains and the know-how to steer you right.

Let’s Connect

COMPATIBILITY

YEAR MAKE MODEL ENGINE DRIVE
2017-2024 Audi S4 (B9/B9.5) 3.0T Turbocharged AWD
2017-2024 Audi S5 (B9/B9.5) 3.0T Turbocharged AWD
img FITMENT NOTES

Works with the stock turbo, and with TTE and Pure hybrid turbos when paired with the iE turbo inlet and the matching adapter ring (sold separately).

FAQs

How much power will I gain?

Up to 19 HP and 21 ft-lbs over stock with an ECU tune. Hybrid turbo setups can see more.

Do I need the turbo inlet?

No, but it is the biggest next step. Intake alone flows 37% more than stock. With the iE inlet it is 61%.

Will it work with a hybrid turbo?

Yes, with the iE turbo inlet and the matching TTE or Pure adapter ring, sold separately.

Why polymer?

Rotomolded polymer lets us build one seamless airbox with maximum volume, consistent walls and great heat resistance at a lower price.

How long does the install take?

20-45 minutes with basic hand tools. It uses factory-style mounts.

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FROM THE SMALLEST DESIGN DETAILS TO CUSTOMER CARE, WE OBSESS OVER EVERY PART OF YOUR EXPERIENCE.

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average rating 4.9 out of 5
Based on 70 reviews
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70 Reviews
Reviewed by mark l.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

purfect fit

really easy to install looks good . also used the intake manifold . only wish I'd bought the carbon fibre option .

highly recommend 👌

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Reviewed by Jeko A.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

5/5

Correct

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Reviewed by Mike S.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

E Polymer Air Intake System For Audi B9/B9.5 S4 & S5 3.0T

Excellent

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Reviewed by David P.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

I didn't expect this much just from an intake. I'm happy with the performance increase.

I didn't expect a difference form just an intake. Of coarse you need too add the tuner too.

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Reviewed by Noah
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

Love it. Easy install, noticeable increase in horsepower and looks great too!

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Not currently legal for road use in California

Because this part doesn't currently comply with California emissions laws, we can't sell or ship it to California addresses. Everywhere else? Full send.

California Prop 65 warning: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.