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.

• 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
• New OEM gaskets included
• Emissions friendly