Audi fanatics, this is the heart of the RS4 turbo upgrade for your B5 S4/Allroad/A6 2.7T. These RS4-K04's are a factory bolt on for the B5 S4/Allroad/A6 2.7T, they will bolt up to your downpipes/catalytic converters, and exhaust manifolds.
K04-025 & K04-026 - On Sale for 2250USD shipped