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Use a fuel-line quick-disconnect tool to clamp off the fuel line and prevent spillage.
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Since the intake manifold provides a mount for the power steering pump, it has to be loosened to remove the stock headers.
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After disconnecting the air inlet tube (not shown), remove the throttle cable, electrical connectors and vacuum lines.
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Apply some lubricant to loosen the bolts for the lower end of the stock exhaust manifold. Disconnect and separate the oxygen sensor as well.
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To keep the engine internals clean, use an air hose to clear away dust and debris before unbolting and removing the intake manifold.
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First loosen but don't remove the bolts at the center and extreme ends of the exhaust manifold. These act as temporary supports while you remove the remaining bolts. Then remove the stock exhaust manifold.
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Note the difference in the configuration of the stock versus the Gale Banks exhaust manifold.
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Close-up of Banks headers shows the mandrel-bent primary tubes and seamless Y-connectors.
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After cleaning off the old gasket material with a scouring pad and solvent (be careful that debris doesn't enter the ports), install the new high-temp, metal-reinforced gasket supplied with the Banks manifold.
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Carefully fit on the new exhaust headers, and apply an anti-seize compound to the header bolts.
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Be sure to torque down the bolts to 24 lb.-ft. and in the pattern shown in the manual. Attach the lower end of the manifold to the exhaust pipe. Now you can re-attach the stock intake, steering pump, fuel rail, vacuum lines, electrical connections and inlet tube.
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