The ultimate chip upgrade for the S4 4.2 engine is available from APR. After months of long nights and many hours of dyno work we are pleased to offer you chip tuning that is second to none. We have worked hand in hand with many customers to deliver a chip that works. Expect increases in throttle response and a smoother, more powerful top end.

APR chips are available in an octane specific version for the octane of gasoline that you typically run in your car. The power that the chip makes also depends on which ECU is in your vehicle. The S4 4.2 ECU can be upgraded with either the use of a soldered in EMCS module, or DirectPort Programming. Power is increased to 352hp/312lb-ft


For a limited time only, this software includes ALL EMCS programs and options.
These options include:

Stock Program
91 Chipped Program
93 Chipped Program

Valet Program Fault Code Erase
Throttle Body Alignment
Security Feature
APR AntiTheft

Attention International Buyers! We cannot ship APR products internationally. We are authorized to ship products within the United States Only.

APR LLC is an automotive engineering firm operating a 36,000 sq. ft. performance campus in Opelika, AL. APR was founded in 1997 with a corporate philosophy of Integrity, Excellence and Innovation. APR's Sole Mission is to provide the highest quality and most highly engineered aftermarket performance products available for Porsche, Audi and Volkswagen vehicles.

APR, Enhancing the Driving Experience with No Compromise.