Project Light Speed Part 2 - LS1 Engine Header Test
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Don't be so quick to toss those cast-iron exhaust manifolds in the trash, especially if they are the Corvette style that look like these. Our testing shows that on a current stock LS1 engine, the Vette manifolds are only slightly off a great set of 131/44-inch headers. Note how the iron manifold is configured more like headers than a log manifold. View Related Article
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