S&S Cycle 08-16 Touring Super Stock 89cc Cylinder Head Kit - Wrinkle BlackBrand S&S Cycle Part Number 106 3240 Category Engine Components Heads Condition Brand New Original Manufacturer Packaging These S&S Super Stock high performance cylinder heads are designed for 2006 '16 engines with stock crankcase. They work well with engines of stock displacement , but are ideal for somewhat larger stroker or big bore engines up to 110". The 89cc combustion chamber provides a slightly higher than stock, but still manageable