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  • M8 Rocker Box Upgrades

  • Feuling 1231 Rocker Shafts for Milwaukee-Eight Models

Feuling 1231 Rocker Shafts for Milwaukee-Eight Models

$49.13 $89.91
Description Feuling 1231 Rocker Shafts for Milwaukee-Eight Models Designed with strength in mind, delivering over double the strength of factory and competitor rocker shafts. Precision ground from 4140HT steel, gas nitrided, and final surface treated for maximum durability. Key Features & Benefits: Over 2× stronger than OEM and competing rocker shafts Precision ground from 4140HT steel Gas nitrided and surface treated for superior wear resistance Custom tooling with countersink relief for bolt/nut head Eliminates excessive end machining found in factory designs Engineered after real-world road race failure analysis Built to withstand high-lift camshafts and heavy valve spring pressures Ideal upgrade or stock replacement for all M8 engines Development Insight:After experiencing a rocker shaft failure while road racing a 2019 Road Glide at Laguna Seca in 2020, Feuling sourced the highest-quality materials and heat-treat process available to create the strongest rocker shaft on the market. Fitment & Quantity: Recommended for all Milwaukee-Eight engines Especially suited for performance cam applications Qty: 4 rocker shafts
M8 Rocker Box Upgrades

M8 Rocker Box Upgrades

  • Feuling ARP CYLINDER STUD & HEAD BOLT KIT 3024
    $56.49 $77.96
  • Feuling ARP ROCKER BOX FASTENER KIT 3047
    $68.11 $102.85
  • Feuling 1230 Gorilla Rocker Shaft Shims for Milwaukee-Eight Models
    $71.96 $125.2
  • Feuling Endurance Beehive Valve Spring Kit for Milwaukee-Eight Models
    $50.15 $95.79
  • Feuling 1231 Rocker Shafts for Milwaukee-Eight Models
    $49.13 $89.91
  • Feuling 3007 Head Bolt Kit for Harley Milwaukee-Eight Models
    $65.03 $78.69
  • S&S 900-1186 Billet Cylinder Head Breathers for 2017-2023 Milwaukee-Eight Models
    $58.19 $75.65
  • Feuling 1232 Rocker Shafts with ARP Stud & Nut Kit for Milwaukee-Eight Models
    $63.54 $125.17
  • Feuling 3250 Cylinder Head Breathers for 2017-2023 Milwaukee-Eight Models
    $69.43 $88.87
  • S&S Cycle 900-1092 Top End Guardian Kit for 2017-Newer M8 Models
    $43.28 $70.11
  • S&S 900-1006 Head Bolt Kit 12-Point for Harley M8 Models
    $54.91 $71.38

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