S&S Cycle 99-05 BT Super Stock 79cc Cylinder Head Kit - Wrinkle BlackBrand S&S Cycle Part Number 900 0251 Category Engine Components Heads Condition Brand New Original Manufacturer Packaging These S&S Super Stock high performance cylinder heads are designed for 1999 '05 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 79cc combustion chamber provides a slightly higher than stock, which makes most performance