Hemi Valvetrain And Head Upgrades
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The stock 5.7/6.1 parts are high quality, but the beehive valvesprings can fail when teamed with hotter-than-stock aftermarket cam profiles. The 5.7's factory installed springs are rated at a healthy 260 pounds (SRT8 is slightly more). But both coil bind at about 0.550-inch lift and cannot be teamed with higher lift cams. View Related Article
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