APR 18-25 Audi S4/S5 (B9) Catback Exhaust System

SKU: APRCBK0012

APR Catback Exhaust Systems...

APR 18-25 Audi S4/S5 (B9) Catback Exhaust System

SKU: APRCBK0012

APR Catback Exhaust Systems...

Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.

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Description

Unmatched Design and Precision Engineering

Data: v4.2 - Upd: 2026-10-21 20:05:32

Features

Complete catalyst-back system including downpipes, extending from the factory catalyst back.
Fully emissions compliant for worry-free operation.
Includes an upgraded tunnel brace to accommodate the larger piping.
Integrated Helmholtz resonator minimizes drone and enhances sound quality.
Mandrel-bent brushed piping paired with electropolished cast splitters for a refined finish.
Optimized flow through dual 2.5” downpipes, 2.75” midpipes, and a 3.5” midpipe.
Performance gains of 10 HP and 12 FT-LBS of torque delivered to all four wheels.
Precision brackets and slip clamps ensure accurate alignment and hassle-free installation.
Premium T304 stainless steel construction with TIG welding for strength and durability.
Removable quad 3.5” motorsport-style polished tips with APR logo; optional styles available.
Smooth transitions and straight-through components maximize performance by reducing restrictions.
Strikes the perfect balance of power, sound, style, and quality for enthusiasts.
Valve-controlled rear mufflers dynamically adjust sound based on driving style.

Specifications

Reference Information

Brand Name/s	Apr
StreetFX SKU	aprCBK0012
SFX Item ID	6853617
Supplier Item Code	6853617
Manufacturer SKU	CBK0012
Manufacturer UPC	810009932550
Alternative References	S4/S5, (B9)