BTR LS Coolant Steam Vent Plug - BTR-LS2540

Replacement plug for unused rear cylinder-head coolant steam-vent ports on compatible GM Gen III/IV LS engines. BTR lists LS1, LS2, LS3, LS6, LS7 and compatible 4.8L, 5.3L, and 6.0L truck applications.

Direct replacement for GM 12602540; also replaces 12562788, 12563325, and 12570678. Sold individually; two are typically used for a front-only steam-vent crossover arrangement. Maintain proper coolant air evacuation through the remaining vent system.