S&S 4 inch big bore Sidewinder kit is available now! No machining, no rebalancing, just bolt in pistons and cylinders in place of the stockers. 1999-2006 Twin Cam 88® engines roll up to 100ci, and 2007-later (except 2017 touring models) become 110ci monsters! No machining necessary and install can be done with engine still in the bike. Kit works well with stock cylinder heads, or let S&S CNC port those heads for even more power.
S&S 4” bore kits are available in color matched silver or wrinkle-black powder coat finish. The 10.5:1 compression makes for a very streetable and dependable engine that also responds well to performance cams.
As always, S&S Proven Performance® products…Made In The USA! For more information see your local dealer or click here