This is the ultimate intake upgrade for the Audi S4 and S5 (B9). It flows 31% more than stock, reduces pressure drop, and improves turbocharger efficiency. This directly translates to +19 AWHP and +20 AWFT-LBS of torque on top of our Stage 1 (93) tune making this a simple upgrade for more power you can feel.
APR Carbon Fiber Intake System for the 2018+ Audi S4/S5
Full intake system: Inlet, airbox, filter, and inlet piping
+19 AWHP & +20 AWFT-LBS gain over stock (APR Stage 1 93)
Flows 31% more than stock
Reduced pressure drop at the turbo inlets
Improved linearization across the turbos
Enhanced engine sound
Carbon fiber construction
Turbos spool faster
Turbos operate more efficiently
Massive 7” x 7” filter with a 4” outlet and 5.5” frontal inlet
High flow and washable pleated cotton gauze filter material
Airbox has additional flow paths faced away from the engine
Inlet piping diameter is maximized from the 4” filter all the way to the turbocharger
Inlet piping addresses system restriction, unlike competitive airbox systems that are compatible with factory inlet piping
Billet turbo adapter ring make fitting this system to a larger turbo possible