This is a pretty interesting project that no doubt is not going to be easy. The owner, Bryan Whitmore, sourced Advanced Technologies, HT Motorsport and EFI Express to complete swapping in the C5 RS6 twin turbo 4.2 liter V8 into his 2007 B7 RS4. The motor is fully built featuring JE Pistons, IE rods, and other hardware from ARP. He is aiming for 700 horsepower at all 4 wheels. We wish him luck!

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Source: Eurotuner