APR PEX Intake System - Audi S4 / S5 / S5 Sportback (B9) 3.0T 2018-2024

The APR PEX Intake System is a complete induction upgrade for the 3.0T EA839 that replaces every component from the inlet scoop to the turbocharger inlet, removing the factory necked down restrictions for the largest inlet the engine bay allows. A 7 by 7 inch washable pleated cotton gauze filter with a 5.5 inch frontal inlet and 4 inch outlet feeds a heat shielded PEX airbox, and a high temperature composite turbo inlet uses thin wall construction to maximize internal diameter. Airflow improves 31% over stock, from 400 CFM to 525 CFM, adding 19 AWHP and 20 AWFT-LBS on an APR Stage 1 93 octane S4. A billet turbo inlet adapter accommodates larger turbochargers, and OEM gaskets, clamps and hardware are included.

Specifications

Documents: Installation Instructions (PDF)

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy