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Shop Work: Roller Rockers: Can a Simple Bolt-On Really Yield Big Gains?

Many of our classics don’t feature modern overhead-cam engines, so rocker arms are used to articulate the valves. That begs an important question: Can the system be improved?

engine Forum Topics

M44 Engine and Trans
2007 Mazda Miata motor 2.0 L 85k miles. Comes with A/C,alternator,radiator (Orlando) - NMNA
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