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APR Presents: Audi C6 RS6 5.0 TFSI V10 ECU Upgrade!
Product Page APR is pleased to present the ultimate ECU Upgrade for the Audi RS6 5.0TFSI V10 Twin Turbo. After months of long nights and many hours of testing, development and more testing, we are pleased to offer you an ECU recalibration that is second to none. APR's extensive research...