The kit includes Screamin’ Eagle CNC Ported Factory Cylinder heads, 58mm ETC throttle body, SE-259E cams, 10.5:1 compression pistons, Perfect-Fit pushrods, SE clutch spring, and all required engine gaskets.This Street Performance kit produces 103 hp and 110 ft-lbs of torque. All EFI-equipped models require ECM calibration* (priced separately).This kit fits 49-state 2010-later Touring models equipped with a Twin Cam 103 engine, and 49-state 2010-11 Touring models equipped with a Twin Cam 96 engine with separate purchase of Screamin’ Eagle 3 7/8″ Big Bore Cylinder Kit. Dual exhaust purchased separately is required for 2010 Street Glide and Road Glide® Custom models.*Recalibration is required for proper installation, and will allow engine to rev to 6200 RPM. See an authorized Harley-Davidson dealer for details. Labor cost is not included.For additional information, please log onto harley-davidson.com.