Except for relieving the combustion chamber on stock 883 cylinder heads, for correct compression ratio, these cylinders make the conversion to 1200cc a bolt-on operation. No cylinder head machining required when used with Screamin Eagle Cylinder Heads, or 883/1200 Conversion Piston Kit. (Cylinders are sold separately. Two are required for the conversion.) All EFI models require ECM calibration (priced separately). For race application only.
Note
Fits Harley-Davidson Sportster XL 883 '04-later models when upgraded with XL1200 pistons.