APR Stainless Steel Rear Cat-Back Exhaust - Audi SQ5 / SQ5 Sportback (B9) 2018-2025

APR's rear cat-back section for the B9 SQ5 is built from T304 stainless steel with mandrel-bent brushed piping, electropolished cast splitters and TIG welding throughout. Flow runs from dual 2.75 in midpipes into a single 3.5 in center pipe, a layout taken from the higher output RS4 and RS5, before splitting into dual 3 in downturns. A valve-controlled rear muffler adjusts the note to driving style and an integrated muffler section holds drone down. APR rates the system at 5 AWHP and 6 AWFT-LBS on its own, or 10 AWHP and 12 AWFT-LBS when it is run with the APR Midpipe Exhaust System. Precision brackets and slip clamps handle alignment, it bolts to the factory exhaust, and it is emissions compliant.

Specifications

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