Sale

ECS Tuning

Forged Carbon Fiber Rear Diffuser

$998.99 $578.19 Save $420.80

SKU: ES4490851

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return

Description

The ECS Tuning Forged Carbon Fiber Rear Diffuser is engineered to provide an aggressive and sporty aesthetic upgrade for the rear of your B8.5 Audi S4 or A4 S-Line. It perfectly complements the factory appeal of the facelifted B8 models, setting your vehicle apart. Installation is straightforward and requires no drilling, cutting, or modifications. For a cohesive exterior transformation, ECS Tuning recommends pairing this rear diffuser with their Carbon Fiber Trunk Spoiler and Side Blades.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandECS Tuning
Part NumberES4490851
CategoryExterior Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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