Kelleners Sport Tunes the BMW 1-Series M Coupe to 410HP

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.As a result,