New cylinder heads are available for an additional $200.00

JCS 325 RTKStock 16004799.00550.00
JCS 3371 RTK1641 cc4899.00550.00
JCS 31776 RTK1776 cc5849.00550.00
JCS 31835 RTK1835 cc5849.00550.00
JCS 31914 RTK1914 cc5849.00550.00
JCS 31904 RTK1904 cc Stroker6349.00550.00
JCS 32110 RTK2110 cc Stroker6349.00550.00
JCS 32180 RTK2180 cc Stroker6349.00550.00
JCS 32275 RTK2275 cc Stroker6449.00550.00
JCS 32332 RTK2332 cc Stroker6449.00550.00