Baron Custom Accessories SR Ported Manifold - Road Star 1600 (99-03)

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If you look inside a stock manifold, you'll notice squared edges that
disrupts air-flow and cuts engine efficiency. With special tooling, Barons
re-shapes and smooths out the manifold, which improves air flow and
velocity into the heads. The result is a 7 to 9 hp gain. The manifold
installs quickly with a BAK.