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Audi S4 Rear Bumper Diffusers

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ES#4147363 - 028807ecs01KT - Audi B8.5 S4 / A4 S-Line Rear Diffuser - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits facelift B8.5 (2013+) models only

Brand:
ECS - Corporate Logo
ES#:
4147363
Mfg#:
028807ECS01KT
In Stock
ON SALE! SAVE 25%
$399.99

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

$299.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4056580 - 006077LA01 - Audi B9 S4 Rear Diffuser - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift models (up to 2019) without integrated tips in the rear valance

Brand:
ECS - Corporate Logo
ES#:
4056580
Mfg#:
006077LA01
In Stock
ON SALE! SAVE 27%
$411.99

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

$299.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4033487 - 028808ECS01 - Audi B8 S4 / A4 S-Line Rear Diffuser - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift B8 models only

Brand:
ECS - Corporate Logo
ES#:
4033487
Mfg#:
028808ECS01
In Stock
ON SALE! SAVE 20%
$411.99

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

$329.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3085916 - 018359ECS01A - Audi B8.5 S4 / A4 S-Line Carbon Fiber Rear Diffuser - Hand-laid carbon fiber to upgrade your exterior styling - ECS - Audi

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!

From the 2013 model year

Brand:
ECS - Corporate Logo
ES#:
3085916
Mfg#:
018359ECS01A
In Stock
ON SALE! SAVE 15%
$999.99

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

$849.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4751213 - 026861ECS01EBKT - Audi B8.5 S4 Facelift Rear Diffuser & Trunk Spoiler - Add some aggressive styling to your Audi! - Enthusiast Bundles - Audi

Add some aggressive styling to your Audi! 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
Fits facelift B8.5 (2013+) models only

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751213
Mfg#:
026861ECS01EBKT
In Stock
ON SALE! SAVE 49%
$785.48

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

$399.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3247439 - 023797ECS01 - Audi B9 S4 Carbon Fiber Rear Diffuser  - Hand-laid carbon fiber to upgrade your exterior styling - ECS - Audi

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!

Fits pre-facelift models (up to 2019) without integrated tips in the rear valance

Brand:
ECS - Corporate Logo
ES#:
3247439
Mfg#:
023797ECS01
In Stock
ON SALE! SAVE 57%
$1029.99

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

$446.12 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3200799 - 021532ECS01A - Carbon Fiber Rear Diffuser - Audi B8 A4/S4 Pre-facelift - Hand-laid carbon fiber to upgrade your exterior styling - ECS - Audi

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!

Up to the 2012 model year

Brand:
ECS - Corporate Logo
ES#:
3200799
Mfg#:
021532ECS01A
In Stock
ON SALE! SAVE 30%
$999.99

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

$699.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4490851 - 018359ECS01-02 - Audi B8.5 S4 / A4 S-Line Forged Carbon Fiber Rear Diffuser - Hand-laid chopped carbon fiber to upgrade your exterior styling - ECS - Audi

Hand-laid chopped 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!

From the 2013 model year

Brand:
ECS - Corporate Logo
ES#:
4490851
Mfg#:
018359ECS01-02
In Stock
ON SALE! SAVE 36%
$998.99

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

$637.04 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4044452 - 024846ecs01KT1 - Audi B8.5 S4 / A4 S-Line Rear Bumper Side Splitters - Gloss Black - Spice up the exterior of your Audi with gloss black spats! - ECS - Audi

Spice up the exterior of your Audi with gloss black spats! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits 2013+ A4 S-Line and S4 rear bumpers

Brand:
ECS - Corporate Logo
ES#:
4044452
Mfg#:
024846ECS01KT1
In Stock
ON SALE! SAVE 25%
$136.98

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

$102.73 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4164511 - 004751la01 - Audi B9 S4 / A4 S-Line Rear Bumper Side Splitters - Gloss Black - Spice up the exterior of your Audi with gloss black spats! - ECS - Audi

Spice up the exterior of your Audi with gloss black spats! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift models up to 2019 model year

Brand:
ECS - Corporate Logo
ES#:
4164511
Mfg#:
004751LA01
In Stock
ON SALE! SAVE 32%
$130.99

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

$89.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4751275 - 028801ECS01EBKT - Audi B9 S4 Pre-facelift Rear Diffuser & Trunk Spoiler - Add some aggressive styling to your Audi! - Enthusiast Bundles - Audi

Add some aggressive styling to your Audi! 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
Fits pre-facelift models (up to 2019) without integrated tips in the rear valance

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751275
Mfg#:
028801ECS01EBKT
In Stock
ON SALE! SAVE 36%
$696.26

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

$449.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4751215 - 026861ECS01EB2KT - Audi B8 S4 Pre-facelift Rear Diffuser & Trunk Spoiler - Add some aggressive styling to your Audi! - Enthusiast Bundles - Audi

Add some aggressive styling to your Audi! 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
Fits pre-facelift B8 models only

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751215
Mfg#:
026861ECS01EB2KT
In Stock
ON SALE! SAVE 39%
$733.99

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

$449.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3142795 - AS410-CFRVP - Carbon Fiber Rear Valance w/Rear Splitter - Delivers an unmatched combination of aggressiveness and luxury elegance - Deval - Audi

Delivers an unmatched combination of aggressiveness and luxury elegance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Deval - Corporate Logo
ES#:
3142795
Mfg#:
AS410-CFRVP
Special Order: No Guaranteed ETA
$1000.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4000981 - D38234 - Carbon Fiber Rear Diffuser - Designed and manufactured to improve performance and everyday drivability - Deval - Audi

Designed and manufactured to improve performance and everyday drivability affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Deval - Corporate Logo
ES#:
4000981
Mfg#:
D38234
Special Order: No Guaranteed ETA
$890.00 USD
This product is lifetime replacement eligible Lifetime Replacement
ES#3142811 - D28244 - Carbon Fiber Rear Diffuser - Delivers an unmatched combination of aggressiveness and luxury elegance - Deval - Audi

Delivers an unmatched combination of aggressiveness and luxury elegance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Deval - Corporate Logo
ES#:
3142811
Mfg#:
D28244
Special Order: No Guaranteed ETA
$850.00 USD
This product is lifetime replacement eligible Lifetime Replacement
ES#451244 - 8K0807521D1RR - S-Line Rear Diffuser - Platinum Grey - Featuring dual exit / single tip exhaust provisions - Genuine Volkswagen Audi - Audi

Featuring dual exit / single tip exhaust provisions affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
451244
Mfg#:
8K0807521D1RR
Ships in 2 Business Days
8% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$260.00

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

$237.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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