FiTech EFI Tuning Forum MenuForum NavigationForumMembersActivityLoginRegisterForum breadcrumbs - You are here:ForumPost History: swhiplashPlease Login or Register to create posts and topics.Post History: swhiplashswhiplashUserProfilePost HistoryRunning an Ultimate LS 500 system on a 6L LS in a swapped Cutlass. Recently replaced my manifold gas …In: Lost Vacuum Boost after Gasket Replacement3 years ago