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Audi S4 Performance Parts & Upgrades

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ES#4070112 - CTS-EM-B567-50D - CTS Street Sport Engine Mount - Priced Each - 50 Durometer rubber construction - CTS - Audi

50 Durometer rubber construction affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
4070112
Mfg#:
CTS-EM-B567-50D
Ships in 7 Business Days
$94.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2996217 - 003276ECS01 - LED Reverse Light Kit - Illuminate the path behind you with these bright LED's from Ziza! - ZiZa - Audi

Illuminate the path behind you with these bright LED's from Ziza! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles from the 2013 model year only (B8.5 models only)

Brand:
ZiZa - Corporate Logo
ES#:
2996217
Mfg#:
003276ECS01
In Stock
ON SALE! SAVE 10%
$69.99

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

$62.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2730962 - Q-SPack45-50 - H&R Quick-Safe Stud Conversion Kit - Set of 20 studs. M14 x 1.5 x 50 - H&R - Audi Volkswagen

Set of 20 studs. M14 x 1.5 x 50 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
2730962
Mfg#:
Q-SPACK45-50
Ships in 3 Business Days
$150.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2731486 - Q-SPack45-40 - H&R Quick-Safe Stud Conversion Kit - Set of 20 studs. M14 x 1.5 x 40 - H&R - Audi Volkswagen

Set of 20 studs. M14 x 1.5 x 40 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
2731486
Mfg#:
Q-SPACK45-40
Ships in 3 Business Days
$150.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4390845 - 034-108-1902 - SuperDuper Charger 84mm Throttle Body System - Spercharge the performance of your B8/8.5 Audi S4/S5 with the 034Motorsport SuperDuper Charger 84mm Throttle Body System! - 034Motorsport - Audi

Süpercharge the performance of your B8/8.5 Audi S4/S5 with the 034Motorsport SuperDuper Charger 84mm Throttle Body System! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
034Motorsport Dynamic+ Tuning stage 2+ is required to safely run this throttle body.

Brand:
034Motorsport - Corporate Logo
ES#:
4390845
Mfg#:
034-108-1902
Ships in 2 Business Days
$754.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#650 - BE3-6213.6214 - Sport Shocks & Struts Kit - Recommended for cars with lowering springs - Bilstein - Audi

Recommended for cars with lowering springs affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bilstein - Corporate Logo
ES#:
650
Mfg#:
BE3-6213.6214
In Stock at Vendor
$876.99

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

$752.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3618561 - 034-604-7008 - 034Motorsport Wheel Spacer Pair - 20mm - Designed to fit most Audi & Volkswagen vehicles with a 57.1mm center bore and 5x112mm wheel bolt patterns - 034Motorsport - Audi Volkswagen

Designed to fit most Audi & Volkswagen vehicles with a 57.1mm center bore and 5x112mm wheel bolt patterns affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3618561
Mfg#:
034-604-7008
In Stock
$125.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3447962 - 034-509-2009 - Performance Snub Mount With Bracket - Greatly reduces unwanted engine movement w/o excess vibration - 034Motorsport - Audi

Greatly reduces unwanted engine movement w/o excess vibration affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3447962
Mfg#:
034-509-2009
In Stock
$125.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3420691 - MSS0530-B - Godspeed Mono-SS Coilover Set - Adjustable Dampening - Features 16 levels of damping adjustment and full length adjustability - GODSPEED - Audi

Features 16 levels of damping adjustment and full length adjustability affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
GODSPEED - Corporate Logo
ES#:
3420691
Mfg#:
MSS0530-B
Ships in 7 Business Days
$750.00 USD
This product is lifetime replacement eligible Lifetime Replacement
ES#2515366 - S430TSTG14CHP - APR Stage I Performance Software - *Fully Loaded - Gains from 79 AWHP/58 AWTQ on 91 octane up to 103 AWHP/76 AWTQ on 100 octane - APR - Audi

Gains from 79 AWHP/58 AWTQ on 91 octane up to 103 AWHP/76 AWTQ on 100 octane Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
This upgrade must be performed at ECS Tuning's facility in Ohio.
Vehicle must be brought to ECS Tuning for programming - *Fully loaded multi-program software available for pre-facelift models only (up to 2012 model year) *

Brand:
APR - Corporate Logo
ES#:
2515366
Mfg#:
S430TSTG14CHP
In Stock
$749.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3219312 - 30tfsiupgradeKT1 -  Stage II Software Upgrade - For Customers Without Existing APR Stage I Software - APR Supercharger Pulley Software upgrade for customers without existing APR Stage I software - APR - Audi

APR Supercharger Pulley Software upgrade for customers without existing APR Stage I software Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
For use with the APR Supercharger Pulley Upgrades - This upgrade must be performed at ECS Tuning's facili

Brand:
APR - Corporate Logo
ES#:
3219312
Mfg#:
30TFSIUPGRADEKT1
Ships in 1-2 days
$749.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#5435532 - HW-561 - CTS Turbo Rear Subframe Insert Set - Lock down your B9 Audi's chassis and eliminate rear subframe flex with CTS Turbo™s billet aluminum insert set, delivering sharper handling and instant power transfer with minimal NVH. - CTS - Audi

Lock down your B9 Audi's chassis and eliminate rear subframe flex with CTS Turbo’s billet aluminum insert set, delivering sharper handling and instant power transfer with minimal NVH. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
5435532
Mfg#:
HW-561
Ships in 3 Business Days
$149.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#5470749 - 019196ECSEBKT - Audi B9 A4/S4 Carbon Fiber Front Lip Spoiler & Grille Accent Set - Hand-laid carbon fiber to upgrade your exterior styling - Enthusiast Bundles - Audi

Hand-laid carbon fiber to upgrade your exterior styling Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
5470749
Mfg#:
019196ECSEBKT
In Stock
ON SALE!
$749.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4339359 - 917365 - RaceChip GTS Black - Get up to +66 hp and +52 lb-ft through a safe and easy to use tuning module from RaceChip - Race Chip - Audi

Get up to +66 hp and +52 lb-ft through a safe and easy to use tuning module from RaceChip affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Race Chip - Corporate Logo
ES#:
4339359
Mfg#:
917365
Ships in 3 Business Days
$749.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3176342 - 034-505-2001-SD - Street Density Rear Differential Bushings - Pair - Eliminates excessive rear differential movement and provides quick feedback - 034Motorsport - Audi

Eliminates excessive rear differential movement and provides quick feedback affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3176342
Mfg#:
034-505-2001-SD
In Stock
$44.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2207808 - B5LEDKIT - B5 A4/S4 Master LED Interior Lighting Kit - Transform your complete interior in minutes with new LED interior bulbs from Ziza - ZiZa - Audi

Transform your complete interior in minutes with new LED interior bulbs from Ziza affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ZiZa - Corporate Logo
ES#:
2207808
Mfg#:
B5LEDKIT
In Stock
ON SALE! SAVE 50%
$114.99

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

$57.50 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

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