1mm  Valve Lift  Application  263° Intake / 257° Exhaust   10

45mm Exhaust   Rally / Race  303° Intake / 293° Exhaust   13

Please note that these 129

For engines exceeding 800+ horsepower

BMW M50 M52 S50 S52 Steel 8.5in Flywheel SFi 1mm Valve Lift Application 263°Tilton Engineering Steel Flywheel BMW M50 M52 S50 S52 Larger diameter. Greater inertia. Smoother power where it counts. Tilton Engineerings 12lb steel flywheel is a high performance upgrade for BMW M50, M52, S50, and S52 engines, engineered with a larger diameter than the OEM flywheel. This added size, combined with its 12 pound mass, provides increased rotational inertiatranslating to smoother, more consistent power delivery across the rev range.