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German aftermarket firm Kelleners Sport is one of the first official tuners to get its hands on the new BMW 1-Series M Coupe and offer a complete conversion. Named KS1-S, the modified 1 M Coupe’s turbocharged straight-six now delivers 410-horses, or a good 20% more than the standard car, and just 10HP short of the E92 M3, while torque is increased from 450 to 550 Nm or 405.7 lb-ft. Read more »