S&S Cycle Adjustable Chromoly Pushrod Set for 1966-1984 Harley-Davidson Big Twin

S&S Cycle Adjustable Chromoly Pushrod Set for 1966-1984 Harley-Davidson Big Twin

Adjusting valve train pre-load on a Shovelhead with stock hydraulic tappets requires pushrods that allow precise adjustment in the frame. These S&S Cycle adjustable pushrods are machined to exacting tolerances for a consistent fit and proper pushrod geometry. The adjustable design lets the technician dial in correct lifter pre-load during installation without repeated trial-and-error.

Key Features

• Adjustable chromoly pushrod set for 1966-1984 Harley-Davidson Shovelhead Big Twin engines
• For use with stock hydraulic tappets
• Aircraft-grade seamless 4130 chromoly heat-treated steel tubing – lighter and stronger than stock
• 7/16-inch OD chromoly tubing with two intake and two exhaust pushrods
• Includes adjusting screw and locknut for precise lifter pre-load setup
• Replaces OEM pushrod assembly 17904-66
• Made in the USA by S&S Cycle

Technical Specifications

• Material: 7/16-inch OD 4130 chromoly seamless steel tubing, heat-treated
• Contents: 4 pushrods (2 intake, 2 exhaust) with adjusting screws and locknuts
• OEM Replacement: 17904-66
• Application: 1966-1984 Shovelhead Big Twin with stock hydraulic tappets
• Country of Origin: USA

Fitment Notes

• Fits 1966-1984 Harley-Davidson Shovelhead Big Twin engines with stock hydraulic tappets
• Not for use with solid lifter conversions or non-stock tappet configurations
• Use adjusting screw (18556-57) and lock nut (18570-38) for installation – included in kit
• Review the Fitment tab for complete year and model breakdown