Aluminum with Viton O-rings
Directly to replace the factory plastic barbell
Rear oil passage plug (AKA "barbell") coomptible with Gen V LT Series engines, including Vortec truck applications (4.3L, 5.3L, 6.2L, 6.6L) (LV1, LV3, LT1, LT2, LT4, LT5, L83, L8B, L82, L84, L86, L87 & L8T)