While "1.46" is not a standard Audi part number, it most likely designates a specific from a tuner like Unitronic , GIAC , or 034Motorsport .
The terminology typically refers to a specific Audi S4 (B5 generation) modified with a 2.4L engine head (from a naturally aspirated V6) and a performance tune —likely version 1.46 of a specific tuner's software (such as from specialized European tuning houses). 1. Platform Overview: Audi S4 (B5)
The 2.4L heads often have larger intake ports compared to the stock 2.7T heads, providing better airflow for high-boost applications.
Features a 6-speed manual or 5-speed Tiptronic automatic, with Audi's signature Quattro all-wheel-drive system. 2. The "V2.4" Modification
In the Audi tuning community, "V2.4" refers to swapping the stock 2.7T cylinder heads with found in other Audi models (like the A4/A6 in Europe).
At a "Stage 2" level (requiring exhaust and cooling upgrades), these tunes can push the B5 S4 to 18–22 PSI of boost , resulting in gains of 90–125+ hp over stock. 4. Supporting Modifications & Maintenance To safely run this setup, enthusiasts often include: