Chevy Blazer
Chevy Trucks and SUVs
Toyota 4Runner
1995-2005 Chevy Cavaliers

Manifold vacuum lines go where after installing headers?

Answer

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Wiki User
12/29/2006

Don't sweat it. That big blast of air from the air pump into the manifolds is just a cooling thing. It has no effect on your engine's vacuum. Just leave them open to the air, don't plug them. If you're worried about sucking dust into the engine, don't. The air just goes and right back out according to my mechanic.