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New Audi B7 A4 ECS Carbon Fiber Rear Diffuser

Upgrade your exterior styling with the ECS Tuning Carbon Fiber Rear Diffuser. This diffuser was engineered and designed in-house to add a more aggressive appearance to the rear of your vehicle that matches with the factory appeal of the B7 S4.

The diffuser is crafted of high quality hand laid carbon fiber to achieve it's world class appearance and durability and provides an aggressive and sporty style that's sure to set your vehicle apart from the rest.


New from ECS!

Fits:
For your Audi B7 A4

Audi B7 A4 Carbon Fiber Rear Diffuser - (NO LONGER AVAILABLE)
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#: 3420650
Mfg#: 004070ECS01
No longer available
Carbon Fiber Rear Diffuser - Audi B7 A4/S4 - (NO LONGER AVAILABLE)
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#: 3420654
Mfg#: 004071ECS01
No longer available
Carbon Fiber Trunk Spoiler - Audi B7 A4/S4
Add a touch of style and real carbon fiber to your Audi
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3200077
Mfg#: 013869ECS01A

Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.

Availability:
Special Order: No Guaranteed ETA
On SALE Save 20%
$567.99

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

$454.39 USD
Free Shipping Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Mirror Cap Set - Audi B6/B7/8P/C6
Upgrade your exterior look
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 2804800
Mfg#: 010253ECS01KT

Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.

Availability:
In Stock
On SALE
$344.99

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

$333.90 USD
Free Shipping Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ECS UNIVERSAL Swivel Exhaust Tips - 4.0" Black Chrome - Pair
Stainless Steel exhaust tips featuring swivel attachments for maximum adjustability. 2.5" Swivel Inlet / 4.0" Double Wall, Slant Cut Outlet
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Not vehicle specific. You MUST measure prior to purchasing!
Brand: ECS - Corporate Logo
ES#: 2986537
Mfg#: 003358ECS03A02KT

Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.

Availability:
In Stock
On SALE Save 10%
$221.99

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

$199.99 USD
Free Shipping Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ECS UNIVERSAL Swivel Exhaust Tips - 3.5" Black Chrome - Pair
Stainless Steel exhaust tips featuring swivel attachments for maximum adjustability. 2.5" Swivel Inlet / 3.5" Double Wall, Slant Cut Outlet
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Not vehicle specific. You MUST measure prior to purchasing!
Brand: ECS - Corporate Logo
ES#: 2986535
Mfg#: 006555ECS04A02KT

Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.

Availability:
In Stock
On SALE Save 21%
$151.99

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

$119.99 USD
Free Shipping Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ECS UNIVERSAL Swivel Exhaust Tips - 4.0" Chrome - Pair
Stainless Steel exhaust tips featuring swivel attachments for maximum adjustability. 2.5" Swivel Inlet / 4.0" Double Wall, Slant Cut Outlet
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Not vehicle specific. You MUST measure prior to purchasing!
Brand: ECS - Corporate Logo
ES#: 2986536
Mfg#: 003358ECS03A01KT

Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.

Availability:
In Stock
On SALE Save 10%
$229.99

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

$206.99 USD
Free Shipping Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ECS UNIVERSAL Swivel Exhaust Tips - 3.5" Chrome - Pair
Stainless Steel exhaust tips featuring swivel attachments for maximum adjustability. 2.5" Swivel Inlet / 3.5" Double Wall, Slant Cut Outlet
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Not vehicle specific. You MUST measure prior to purchasing!
Brand: ECS - Corporate Logo
ES#: 2986534
Mfg#: 006555ECS04A01KT

Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.

Availability:
In Stock
On SALE Save 21%
$151.99

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

$119.99 USD
Free Shipping Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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Manufacturer names and/or part numbers are used only for identification purposes.

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