Rear Spoiler Accordion Panel small port It controls the secondary air

It controls the secondary air injection system to reduce emissions during cold starts

OE-quality replacement for conservative driving styles

Direct OE Fit: Replaces original caliper on compatible Audi models

it greatly increases airflow to the engine compared to the stock filter

improving throttle response and freeing up horsepower

Rear Spoiler Accordion Panel small port It controls the secondary airAlso known as the "rear wall", this accordion panel seals off the back of your speed sensitive spoiler. When the spoiler comes up, this is the finish panel that hides the internal workings from view. Every once in a while, these pieces rip and look even worse than if they weren't there at all. Replace your torn one with a brand new OEM piece. Previous Revisions 96451212100 Cross Reference 99351212100