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We usually begin bolt-on efforts like this by swapping the factory air-induction hardware with aftermarket pieces first, and then finish up with exhaust upgrades that typically feature simple after-cat or X-shaped crossover systems. However, with long-tube-header installation being a lot more labor intensive, we chose to make the exhaust mods first. After performing prerequisite tasks such as disconnecting the negative battery cable and raising the car with a twin-post hoist, Eddie removed the factory exhaust manifolds, and then thoroughly cleaned the ports in preparation for the new headers.