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Cancer and Reproductive Harm
- Designed to deliver the most power and torque with Vortec cylinder head P/N 12691728, P/N 19431662, P/N 19431663, P/N 19331470 or P/N 19331472- Use intake manifold gasket kit P/N 19301685 and 8 special manifold bolts, P/N 12550027