T&D Machine Products Competition Shaft Rockers T&D Competition Rocker Arms are the product of years of testing and refinement. Produced with computer aided design, then CNC manufactured to ensure precision in every application. Extensive laboratory and on track testing have proved T&D rockers are the best. Large diameter, deep case hardened 8620 steel shafts, along with 2024 aluminum bodies have proved these rockers to be the lightest, most efficient, and most durable rocker arms available. All T&D Machine Products available, including all options and rocker ratios. - Extensive Laboratory & On-Track Testing - CNC Manufactured - Pressurized Oiling Standard - Stronger 8620 Steel Shafts - Higher Quality 2024 Aluminum Bodies - World Class 7/16" Diameter Adjusters - Fully Rebuildable - Easy Installation & Maintenance
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