The APR Stage 2 ECU Upgrade is now available for the early 2013/2014 Audi S3 models with the Simos 12 ECU.

ECU Box Codes:

8V0906259 S0004
8V0906259 S0006
8V0906259 S0008

The APR Stage II ECU Upgrade is the next step towards making more power! This upgrade requires a high flow Race DP exhaust system, and produces 372-387 HP with 367-409 FT-LBS of torque. Gains as high as 86-104 HP and 82-125 FT-LBS of torque are available throughout the power band.

The upgrade is offered in high, medium and low torque versions, and is available for various fuel grades. The high torque upgrade requires, and the medium torque upgrade may require an upgraded clutch or APR’s TCU Upgrade to avoid clutch slip, so low torque software is available, offering an impressive 367 FT-LBs of torque.

An upgraded intake is required to meet the advertised low and medium output power figures, and an upgraded intercooler is required to meet the high output power figures. No ECU modification is necessary to run an upgraded catback exhaust system, or other small engine modifications. APR recommends using colder heat-range spark plugs (Ex: NGK-R7437-9), properly gapped to a tighter gap (Ex: 0.024″ ±0.002″ or 0.6mm ±0.05mm), properly installed and torqued (Ex: Per the manufacturers specifications), and maintained with a shorter changer interval (Ex: 10,000-15,000 mi or 16,000-24,000 km).

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