The S4 is named after the top-secret base where the "actual" alien space craft used to be located in the late 1980's and early 1990's. Whistleblower Bob Lazar made the Nevada base famous when he revealed the existence and location of this facility.
Price $2100.00 USD (DVO Topaz Shock, Post Collar)
$1600.00 USD no shock, Post Collar
*all numbers are with 29" wheels