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Your Vehicle Audi Q5 3.0T

Top Mods for your Audi B9 S4 3.0T

ECS loves helping you make your car all it can be; that's why we've put all the top-of-the-line performance parts for your AUDI B9 S4 together in one place. This list, compiled by our own AUDI gurus, is everything you need to outfit your car with all those goodies you've wanted for your build. Let's make race season even more fun with all the best performance parts for your Audi B9 S4!


Hand Selected By Our Team Of Enthusiast

For Your
Audi B9 S4 3.0T

Complete Drivetrain Mount Insert Kit
Decrease slop and increase drivetrain rigidity and response!
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Brand: ECS - Corporate Logo
ES#: 3194637
Mfg#: 019208ECS01KT1

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Availability:
Ships in 6 Business Days
On SALE
$237.99

This product was last offered at the strikethrough price on
05-02-2026

$226.09 USD
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This product is lifetime replacement eligible Lifetime Replacement
Audi B9 A4/S4 Front Lip Spoiler - Gloss Black
Upgrade your exterior styling!
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Brand: ECS - Corporate Logo
ES#: 4147652
Mfg#: 028802ECS01KT

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Availability:
In Stock
On SALE Save 33%
$370.79

This product was last offered at the strikethrough price on
05-02-2026

$249.00 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Front Lip Spoiler - Audi B9 A4/S4
Hand-laid carbon fiber to upgrade your exterior styling
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Brand: ECS - Corporate Logo
ES#: 3146390
Mfg#: 019196ECS01A

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Availability:
In Stock
On SALE Save 41%
Limited Qty Sale
$875.99

This product was last offered at the strikethrough price on
05-02-2026

$515.77 USD
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This product is lifetime replacement eligible Lifetime Replacement
B9.5 Mid-Facelift S4/A4 S-Line 3 Piece Front Lip - Gloss Black
Upgrade your exterior styling!
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Brand: ECS - Corporate Logo
ES#: 4338534
Mfg#: 007041LA01KT

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Availability:
In Stock
On SALE Save 25%
$344.99

This product was last offered at the strikethrough price on
05-02-2026

$258.01 USD
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This product is lifetime replacement eligible Lifetime Replacement
Audi B9 S4 Rear Diffuser - Gloss Black
Add some aggressive styling to your Audi!
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Brand: ECS - Corporate Logo
ES#: 4056580
Mfg#: 006077LA01

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Availability:
In Stock
On SALE Save 27%
$411.99

This product was last offered at the strikethrough price on
05-02-2026

$299.00 USD
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Audi B9 S4 Carbon Fiber Rear Diffuser
Hand-laid carbon fiber to upgrade your exterior styling
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Brand: ECS - Corporate Logo
ES#: 3247439
Mfg#: 023797ECS01

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Availability:
In Stock
On SALE Save 57%
Limited Qty Sale
$1029.99

This product was last offered at the strikethrough price on
05-02-2026

$446.12 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Trunk Spoiler - Audi B9 A4/S4
Add a touch of style and real carbon fiber to your Audi
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Brand: ECS - Corporate Logo
ES#: 3141741
Mfg#: 019220ECS01A

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Availability:
In Stock
On SALE Save 43%
Limited Qty Sale
$694.99

This product was last offered at the strikethrough price on
05-02-2026

$396.00 USD
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This product is lifetime replacement eligible Lifetime Replacement
Audi B9 S4/A4 Trunk Spoiler - Gloss Black
Add some aggressive styling to your Audi!
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Brand: ECS - Corporate Logo
ES#: 3981207
Mfg#: 028801ECS01

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Availability:
In Stock
On SALE Save 37%
$284.99

This product was last offered at the strikethrough price on
05-02-2026

$180.00 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Grille Accent Set - Audi B9 A4/S4
Hand-laid carbon fiber to upgrade your exterior styling
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3420220
Mfg#: 024314ECS01

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Availability:
In Stock
On SALE Save 44%
Limited Qty Sale
$576.99

This product was last offered at the strikethrough price on
05-02-2026

$323.43 USD
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This product is lifetime replacement eligible Lifetime Replacement
Audi B9 A4 / S4 Flat Side Skirts - Gloss Black
Enhance your side profile with an aggressive look!
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Brand: ECS - Corporate Logo
ES#: 4163869
Mfg#: 001734LA01

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Availability:
In Stock
On SALE Save 25%
$356.99

This product was last offered at the strikethrough price on
05-02-2026

$269.00 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Side Blade Set
Add a touch of style made with real carbon fiber to your Audi
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Brand: ECS - Corporate Logo
ES#: 3195012
Mfg#: 019189ECS01KT

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Availability:
Ships on Nov 5, 2026
On SALE Save 13%
$1029.99

This product was last offered at the strikethrough price on
05-02-2026

$899.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Mirror Cap Set - Audi B9 A4/A5/S4/S5
With Lane Change Assist
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Brand: ECS - Corporate Logo
ES#: 3411932
Mfg#: 024564ECS01

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Availability:
In Stock
On SALE Save 20%
$405.99

This product was last offered at the strikethrough price on
05-02-2026

$324.47 USD
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This product is lifetime replacement eligible Lifetime Replacement
Audi B9 Carbon Fiber Engine Cover Overlay Kit
Add a touch of carbon fiber to your stock engine cover!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3969803
Mfg#: 023897ECS02

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Availability:
In Stock
On SALE Save 10%
$359.99

This product was last offered at the strikethrough price on
05-02-2026

$323.51 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Audi B9 A4/S4 Transmission Street Shield Aluminum Skid Plate
Protect your transmission pan and improve aerodynamics
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Brand: ECS - Corporate Logo
ES#: 3979295
Mfg#: 027567ECS01KT

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Availability:
In Stock
On SALE Save 15%
$347.99

This product was last offered at the strikethrough price on
05-02-2026

$295.79 USD
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This product is lifetime replacement eligible Lifetime Replacement
Front & Rear 2-Piece Brake Rotor Upgrade Kit
Direct bolt-on replacement - up to 16% less weight!
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Brand: ECS - Corporate Logo
ES#: 4056683
Mfg#: 023938ECS02KT

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Availability:
In Stock
On SALE
$1748.93

This product was last offered at the strikethrough price on
05-02-2026

$1696.46 USD
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This product is lifetime replacement eligible Lifetime Replacement
Front & Rear 2-Piece Scalloped Brake Rotor Kit - No Pads
Direct bolt-on upgrade to Tru-Float scalloped style rotors. Up to 20% less weight!
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Brand: ECS - Corporate Logo
ES#: 4056678
Mfg#: 023940ECS02KTKT

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Availability:
In Stock
On SALE Save 39%
$2217.99

This product was last offered at the strikethrough price on
01-03-2026

$1363.70 USD
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This product is lifetime replacement eligible Lifetime Replacement
Front 2-Piece Brake Rotors - Pair (350x34)
Direct bolt-on replacement - 16% less weight!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3493799
Mfg#: 023938ECS01KT

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Availability:
In Stock
On SALE
$1032.99

This product was last offered at the strikethrough price on
05-02-2026

$1001.09 USD
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This product is lifetime replacement eligible Lifetime Replacement
Front 2-Piece Scalloped Brake Rotors - Pair (350x34)
Direct bolt-on upgrade to Tru-Float scalloped style rotors. Over 15% less weight!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3559513
Mfg#: 023940ECS01KT

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Availability:
In Stock
On SALE Save 30%
$1163.89

This product was last offered at the strikethrough price on
01-03-2026

$814.79 USD
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This product is lifetime replacement eligible Lifetime Replacement
Front & Rear Exact-Fit Stainless Steel Brake Lines - Kit
Complete set of DOT-compliant lines for an improved pedal feel
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3491660
Mfg#: 024921ECS01KT

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Availability:
In Stock
$230.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
Front 2-Piece Brake Rotors - Pair (350x34)
034Motorsport 350mmx34mm 2-Piece Floating Front Brake Rotor Upgrade Kit
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Brand: 034Motorsport - Corporate Logo
ES#: 4429973
Mfg#: 034-301-1008

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Availability:
In Stock
$1050.00 USD
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This product is lifetime replacement eligible Lifetime Replacement
Front & Rear Performance Brake Service Kit - Tru-Float Scalloped
Comprehensive kit includes Tru-Float rotors, pads, sensors, and set screws - Upgrade your brake system with ECS 2-piece Tru-Float scalloped rotors and EBC Yellow Brake Pads!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 4057321
Mfg#: 023940ECSKT

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Availability:
In Stock
On SALE Save 14%
$2858.99

This product was last offered at the strikethrough price on
01-03-2026

$2447.30 USD
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This product is lifetime replacement eligible Lifetime Replacement
19" RSe142 - Set Of Four
19"x9.0" ET40 5x112 - Gloss Black
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand: Neuspeed - Corporate Logo
ES#: 3617750
Mfg#: 88.142.04B1KT

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Availability:
Ships in 2 Business Days
$1592.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
19" Style 349 Wheels - Set Of Four
19"x9.5" ET40 CB66.6 5x112 Matte Black
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Alzor - Corporate Logo
ES#: 2748495
Mfg#: 349A-13KT1

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Availability:
In Stock
On SALE Save 35%
$1300.00

This product was last offered at the strikethrough price on
05-02-2026

$845.00 USD
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This product is lifetime replacement eligible Lifetime Replacement
TTE710 Turbo Upgrade - B9 S4/S5/SQ5 3.0T
Pair this with the Integrated Engineering or 034 Motorsports Stage 3 tune for 600+hp!
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Custom tuning software required for installation.
Brand: The Turbo Engineers - Corporate Logo
ES#: 4493300
Mfg#: TTE10388

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Availability:
Ships on Jun 23, 2026
$3906.99 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Audi B9 (S4/S5/SQ5) – Pure750 Upgraded Turbocharger
Crank up your B9 over 700+awhp with this kit! Price includes a $800.00 refundable core charge.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand: Pure Turbos - Corporate Logo
ES#: 4642701
Mfg#: PURE-30T750KT

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Availability:
Ships in 1 Business Day
$3426.99 USD
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This product is lifetime replacement eligible Lifetime Replacement

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