Getting to the Tip of TPI
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Here's an '87-91 Corvette intake designed for aluminum heads, but it can also be used on early cast-iron heads. When used with the aluminum heads and emission controls, the heat riser tube port (A) brings exhaust from the header to the intake for the EGR. The EGR valve port is shown here (B). Street & Performance supplies plates with gaskets to block off these two ports when used in non-emission controlled vehicles. These intake gaskets have a metal insert with a small coolant hole to allow a measured amount of coolant to exit the rear of the heads through to the intake. View Related Article
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