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Earl's hard line steam tube kit is designed to eliminate trapped air and steam from your engine to prevent hot spots & overheating. Easy bolt-on installation when used with Earl's pivoting steam vent adapters - part # LS9807ERL (2 sets required). Made from attractive stainless steel tubing & black anodized components.This steam tube kit works w/ the Holley LS Hi-Ram, Holley Single Plane, and Sniper Fabricated Intake Manifolds for the GM LS Engine.