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Guaranteed Fitment
Always the correct part
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In-House Experts
We know our products
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Technical Support
We help with any installation questions
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Wordwide Delivery
Fast shipping times
In an effort to perfect Milwaukee-Eight® engine valve train geometry, while improving durability, JIMS® has developed performance rocker shafts and proprietary hardware. The rocker arm shafts are precision machined from a low alloy nickel, chromium, molybdenum case hardened steel. The hardware flats on the end of the shafts are held to a .0005” parallel tolerance, assuring the rocker is seated in the correct position with the pushrod cup & valve stem tip when installed correctly.