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mikep · 06-01-2002, 04:05 PM

Its a manifold heat restrictor. Unless you live in a really cold climate leave it in. It restricts the exhaust gasses heating the intake manifold. I dont use manifold heat at all. No problems

06-01-2002, 04:05 PM	#3
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Its a manifold heat restrictor. Unless you live in a really cold climate leave it in. It restricts the exhaust gasses heating the intake manifold. I dont use manifold heat at all. No problems __________________ No truck :-(