The AWE Tuning RSK04 Fueling Kit picks up where the Audi RS4 leaves off! AWE Tuning worked very closely with GIAC to establish the proper mechanical parameters which would overcome limitations in the RS4 that GIAC documented during chip development. The RS4 Mass Air Flow (MAF) sensor and fuel injectors are inappropriate for use on an S4, and we also had our sights set even higher than chipped RS4 territory with the RSK04 kit.
Important System Requirements:
Please note that we do not recommend using an open air filter element (cone filter) with the RSK04 Fueling kit. We have not documented any power gains with an open air filter element, and use of one requires modification to the MAF housing to ensure proper air/fuel delivery. Use of cone filter without modification to the MAF housing can cause engine damage. Please contact us for more information.
The AWE Tuning RSK04 Fueling Kit is designed to work only with the RS4 K04 turbos installed. The requested boost pressure from the GIAC chip is beyond the safety level of the S4 K03 turbos. The AWE Tuning RSK04 Fueling Kit is also designed to work only with high flow downpipes installed (no pre-cat), as well as a cat back exhaust system. The AWE Tuning/GIAC chip program is designed only to work with the secondary O2 sensors located behind the main catalysts. If your downpipes do not have the secondary O2 sensors located behind the main catalysts, the fuel injection ECU will log a catalyst efficiency code and illuminate the check engine light after 50 miles of driving.

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Related Tags: air filter element, air fuel, audi rs4, audi s4, awe tuning, cat back exhaust, catalysts, chip development, chip program, cone filter, fuel delivery, fuel injectors, giac chip, high flow, k03, k04, mass air flow, mechanical parameters, o2 sensors, safety level