Under the Hood: DodgeSRT-4
The valvetrain uses rocker arms, which increase valvetrain mass compared to a cam-on-bucket design, but with the long stroke, valve float won't be the thing limiting redline. Rocker arms allow the cams (and their big cam gears) to sit closer together, making the cylinder head physically smaller, and, more importantly, they allow more aggressive opening and closing ramps on the cams. Valve lash is hydraulically adjusted, and the cam hits the rocker through a low-friction roller. All good stuff.
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