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Audi S4 Most Popular Parts

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Rear Upper Shock Mount Kit - Pair & Hardware

ES#5491258 - 4K0513353KT1 - Rear Upper Shock Mount Kit - Pair & Hardware - Fits the left and right sides - Assembled By ECS - Audi

Fits the left and right sides 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
5491258
Mfg#:
4K0513353KT1
Ships on Mar 4, 2027
$195.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Full Exhaust Installation Kit

ES#2587682 - 078253039GKT - Full Exhaust Installation Kit - Comes with all the hardware you need to install a full OE exhaust system - Assembled By ECS - Audi

Comes with all the hardware you need to install a full OE exhaust system 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
2587682
Mfg#:
078253039GKT
Back Ordered
$678.99

This product was last offered at the strikethrough price on
06-19-2026

$608.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Radiator Installation Kit

ES#3677745 - 4b3121276aktKT1 - Radiator Installation Kit - Don't reuse old worn radiator mounts - Assembled By ECS - Audi

Don't reuse old worn radiator mounts 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
3677745
Mfg#:
4B3121276AKTKT1
Back Ordered
ON SALE!
$57.99

This product was last offered at the strikethrough price on
11-05-2026

$55.41 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Exterior Bulb Refresh Kit W/ Fog Lights

ES#2581942 - N10566101KT2 - Exterior Bulb Refresh Kit W/ Fog Lights - Includes all headlight, tail light, fog light and side marker bulbs - Assembled By ECS - Audi

Includes all headlight, tail light, fog light and side marker bulbs 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
2581942
Mfg#:
N10566101KT2
Back Ordered
$297.99

This product was last offered at the strikethrough price on
06-12-2026

$257.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Upper Shock Mount Kit - Pair & Hardware

ES#5491260 - 4K0513353KT2 - Rear Upper Shock Mount Kit - Pair & Hardware - Engineered for increased performance and durability over the factory rear shock mounts. - Assembled By ECS - Audi

Engineered for increased performance and durability over the factory rear shock mounts. 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
5491260
Mfg#:
4K0513353KT2
Ships in 1-2 days
ON SALE!
$149.99

This product was last offered at the strikethrough price on
10-28-2026

$144.98 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Special Active Front And Rear Struts With H&R Sport Springs

ES#4698705 - 82451407KT - Special Active Front And Rear Struts With H&R Sport Springs - Average lowering of .80"- 1.6" front and rear - Assembled By ECS - Audi

Average lowering of .80"- 1.6" front and rear 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE
Vehicle will lose Adaptive Dampening Control

Brand:
Assembled By ECS - Corporate Logo
ES#:
4698705
Mfg#:
82451407KT
Back Ordered
$1221.99

This product was last offered at the strikethrough price on
07-01-2026

$1148.99 USD
This product is lifetime replacement eligible Partial Replacement

Rear Upper Shock Mount Kit - Pair & Hardware

ES#5491262 - 8W0513353A2KT1 - Rear Upper Shock Mount Kit - Pair & Hardware - Fits the left and right sides, install hardware included - Assembled By ECS - Audi

Fits the left and right sides, install hardware included 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
5491262
Mfg#:
8W0513353A2KT1
Ships on Dec 1, 2026
$125.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Installation Kit

ES#2593798 - 4B3121200KT1 - Radiator Installation Kit - Don't reuse old worn radiator mounts - Assembled By ECS - Audi

Don't reuse old worn radiator mounts 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
2593798
Mfg#:
4B3121200KT1
Back Ordered
ON SALE!
$57.99

This product was last offered at the strikethrough price on
11-05-2026

$55.41 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Sway Bar & Installation Kit

ES#3691563 - 8e0411309bkt1KT - Front Sway Bar & Installation Kit - Includes the standard sway bar with installation hardware - Assembled By ECS - Audi

Includes the standard sway bar with installation hardware 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
3691563
Mfg#:
8E0411309BKT1KT
Back Ordered
$415.99

This product was last offered at the strikethrough price on
08-31-2026

$389.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Engine Bay Refresh Kit

ES#3691455 - 8e0422376KT - Engine Bay Refresh Kit - Clean up your engine bay with new engine cover kit - Assembled By ECS - Audi

Clean up your engine bay with new engine cover kit 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
3691455
Mfg#:
8E0422376KT
Back Ordered
$607.99

This product was last offered at the strikethrough price on
08-31-2026

$581.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Genuine Rear Shock Absorbers Kit

ES#5504427 - 8F0513025AKT3 - Genuine Rear Shock Absorbers Kit - Restore your factory ride quality! Includes left and right shocks, as well as install hardware. - Assembled By ECS - Audi

Restore your factory ride quality! Includes left and right shocks, as well as install hardware. 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
5504427
Mfg#:
8F0513025AKT3
Ships in 6 Business Days
$2162.99

This product was last offered at the strikethrough price on
08-31-2026

$2058.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Genuine Front Sport Struts Kit

ES#5504428 - 8F0413029BKT1 - Genuine Front Sport Struts Kit - Restore your factory ride quality! Includes left strut and right strut, as well as install hardware. - Assembled By ECS - Audi

Restore your factory ride quality! Includes left strut and right strut, as well as install hardware. 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
5504428
Mfg#:
8F0413029BKT1
Ships in 6 Business Days
ON SALE!
$2174.99

This product was last offered at the strikethrough price on
08-31-2026

$2012.66 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Full Exhaust Installation Kit

ES#2593965 - 077129717QKT1 - Full Exhaust Installation Kit - Comes with all the hardware you need to install a full OE exhaust system - Assembled By ECS - Audi

Comes with all the hardware you need to install a full OE exhaust system 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
2593965
Mfg#:
077129717QKT1
Ships in 4 Business Days
$661.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cup Kit - H&R Springs With Koni Shocks & Struts

ES#2593890 - 29257KT - Cup Kit - H&R Springs With Koni Shocks & Struts - Unrivaled comfort and performance. Average lowering of 1.2"F 1.2"R - Assembled By ECS - Audi

Unrivaled comfort and performance. Average lowering of 1.2"F 1.2"R 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
2593890
Mfg#:
29257KT
Back Ordered
ON SALE!
$1281.99

This product was last offered at the strikethrough price on
10-01-2026

$1184.55 USD
This product is lifetime replacement eligible Lifetime Replacement

Cooling System Refresh Kit - Level 2

ES#4691355 - 8W1121405N1KT - Cooling System Refresh Kit - Level 2 - Replace your thermostat, temp sensor, and expansion tank after performing a proper coolant system flush! - Assembled By ECS - Audi

Replace your thermostat, temp sensor, and expansion tank after performing a proper coolant system flush! 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
4691355
Mfg#:
8W1121405N1KT
Back Ordered
$434.99

This product was last offered at the strikethrough price on
08-31-2026

$330.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Front & Rear Shock Absorbers Kit with Install Hardware

ES#5504420 - 8F0513025AKT2 - Front & Rear Shock Absorbers Kit with Install Hardware - Restore your factory ride quality! Includes left and right shocks, as well as install hardware. - Assembled By ECS - Audi

Restore your factory ride quality! Includes left and right shocks, as well as install hardware. 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
5504420
Mfg#:
8F0513025AKT2
Ships in 6 Business Days
$4336.99

This product was last offered at the strikethrough price on
08-31-2026

$4133.99 USD
This product is lifetime replacement eligible Lifetime Replacement

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