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Heavy Duty and Supreme Connecting Rods for 1981–'84 OHV Big Twins

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Product Reviews

For Stock Rebuilds And Almost Any Performance Upgrade. S&S Heavy Duty connecting rods are recommended for stock rebuilds and high performance street engines. The upper rod area where the rod beam meets the wristpin boss is blended together with a large, smooth radius that evenly distributes the stress load on the rod. The small ends of the rods are fully machined, which increases strength by maintaining a uniform material thickness around the wristpin. The machining process also keeps the difference between the small end weights of each rod to a minimum – allowing for the closest possible balancing job and a smoother running engine.

S&S Supreme rods are even stronger and are recommended for any extremely demanding application. The wristpin end of S&S Supreme rods are not fully machined.

Features and Benefits

  • Thicker I-beam sections for added strength
  • Large radius from beam to wristpin boss for even stress distribution
  • Fully machined wristpin end—uniform thickness and even reciprocating weight
  • Heavy Duty rods are forged from 4140 chromoly steel
  • Supreme rods are forged from 4340 EQ, aircraft quality chromoly steel
  • Heat treated to provide superior strength, hardness, and fatigue resistance
  • S&S crankpins have two oil distribution holes located between the roller bearing paths for better oil distribution and continuous, unbroken support to the bearing
  • Grooved thrust faces on crankpin end of rear rod help maintain lubrication between the rod and flywheel thrust face
  • Rod-to-rod clearance accommodates strokes up to and including 5" stroke


S&S® Connecting Rods for OHV Big Twins
Year Application   Rod type   Bearing Cage Type   Wristpin Diameter   Rod Length   Part Number  
1981–'84   Heavy Duty   Steel 
.791" 7.440" 34-7011  
1981–'84   Supreme   Steel 
.791" 7.440" 34-7212  


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