S&S has been building stroker cranks since the 50s and has it down to an absolute art. Their latest efforts are aimed at the Milwaukee Eight platform (2017 and newer big twins) and open up a whole new level of performance for these engines. Stronger, more durable and trued to a spec others can only dream of, these new flywheel assemblies are the best of the best to build your high performance engine around. Using a heat-treated 4140 material, each assembly is harder and 114% stronger than factory parts.
S&S High Strength Connecting Rods are designed using Finite Element Analysis to eliminate weak spots and create a part that can handle substantially more power. Available in 4.375-in., 4.5-in. and 4.625-in. stroke with tapered or high strength full-width wrist pin to accommodate even the most instance of builds. Each of their flywheel assemblies are also available with or without the counterbalancer gear.
S&S are particularly interested in their 4.625-in. stroker crank and figured they could combine that with the S&S 128-in. Power Package and build a 131-in. monster!
Link: S&S Cycle