INDIVIDUAL B9 Buy on Shopify

Black Audi B9 S4 with the hood open, the black headlight delete kit fitted in place of the passenger-side headlight

Individual B9 · HDK

Audi B9 S4 Headlight Delete Kit

Direct cooler ambient air toward your Cold-Air Intake.

Buy on Shopify See how it works

Made to order. Estimated lead time: about 1 week.

What it does

A dedicated path for cold air.

3D-printed in-house from ASA, it creates a dedicated airflow path from the headlight opening to the intake area, designed to support cooler intake air temperatures (IATs).

Close-up of the black 3D-printed headlight delete kit duct opening beside the honeycomb grille of a B9 S4 — 01 Headlight opening

02 Intake area

Front three-quarter view of a black B9 S4 with the headlight delete kit on an open road

Results

Up to 10°F lower IAT delta at speed

Real-world testing showed an average 5-10°F lower IAT delta at speed and faster IAT recovery times.

Actual IAT changes depend on intake setup, operating conditions, and vehicle configuration.

Film

On the road.

The HDK on a B9 S4, in motion.

Material

ASA

ASA is specifically derived from ABS to better resist UV and will withstand those hot-V temps.

ASA Used in the HDK

UV resistant
Withstands hot-V temps
Will not yellow, chalk, or become brittle outdoors

Fitment

Will it fit your car?

Direct bolt-on fitment: Audi B9 A4 & S4 (2017-2019)
Replaces the passenger-side headlight assembly (right side on US vehicles)
Reuses OEM hardware
Material: ASA, printed in-house (UV and heat resistant over ABS)
Color: Black

Gallery

Up close.

Install

Three steps.

01
Remove the passenger-side (right side, US) headlight assembly.
02
Fit the HDK in its place.
03
Secure it with your OEM hardware.

Detailed install guide coming soon.

FAQ

Questions.

Audi B9 S4 Headlight Delete Kit

Feed it cold air.

Buy on Shopify

Made to order. Estimated lead time: about 1 week.

Lowered black B9 S4 with the headlight delete kit parked at night under red autumn trees