Bring your Twin Cam motorcycle up to the same displacement and power output as the CVO™ Screamin' Eagle® models - a gigantic 1800cc's. This street legal kit combines all the proven components of the CVO Screamin' Eagle models - the 4" Big-Bore forged pistons and cylinders, SE-255 camshafts and cylinder heads with automatic compression release. The Screamin' Eagle cylinder heads and forged piston combination offers a 9.3:1 compression ratio for easy starting. The cylinder heads also prominently feature the "Screamin' Eagle 110 medallion. Kit includes all required gaskets (except primary cover and transmission interface gasket) and hardware to complete the installation. Installation requires case boring. Professional installation recommended. Separate purchase of cam spacers is recommended. Requires separate purchase of appropriate Automatic Compression Release Wiring Harness. All EFI-equipped models require ECM calibration* (priced separately).