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APR's Cold Air Intake System for the 2018-2024 Audi RS4/RS5 2.9T B9 is APR's proven airflow upgrade for the EA839 biturbo V6, delivering a 31% increase in airflow over the factory intake and translating directly to improved turbocharger efficiency, faster spool times, and real power gains on the B9 RS4 and RS5 platform. The PEX airbox construction shields the filter from engine heat while optimized cutouts allow additional airflow paths and produce a refined intake sound signature. A massive 7"×7" washable pleated cotton gauze filter provides outstanding filtration with minimal pressure drop and no replacement interval - simply wash and reinstall.
The complete system includes all OEM gaskets, nuts, bolts, and clamps for a straightforward bolt-on installation with no engine modifications required. For RS4/RS5 owners who want proven APR airflow performance, this system delivers meaningful gains at a more accessible price point than the full carbon fiber CI100042 system.
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