Chevrolet Corvette ZR1 LS9 Engine Specifications - Domestic Exotica
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Showing a further refinement upon the LS7 platform, the LS9 uses rails beneath the rockers to help improve valvetrain control at high rpm. The heads themselves, on the other hand, aren't as exotic, but are certainly effective. They're designed specifically for the LS9, but are close cousins of the LS3 and L92 heads. The rotacast LS9 heads have winglike shapes cast into the intake runners to induce swirl and improve the mixture motion of the pressurized air/fuel charge. View Related Article
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