Cylinder Head Breathers / M8 Motors

• Product: FEULING Cylinder Head Breathers for Milwaukee Eight Engines
• Material: Machined from billet 6061 aluminum
• Design Features:
  • Square surfaces for enhanced umbrella valve sealing
  • Longer main breather exit nipples with dual O-rings for improved sealing
  • Appropriately sized and positioned breather inlets for optimal engine breathing
  • Unique design maximizing breather volume and facilitating easy serviceability
  • Multiple drain ports on the inside floor, with chamfered ID for easy drainage and squared-off exits to reduce oil splash filling
• Finish: Anodized in Feuling red
• Kit Contents:
  • Billet breather housings
  • Billet covers
  • Breather filter elements
  • Umbrella valves
  • High-quality hardware
• Performance:
  • Effective sealing and maintenance of engine vacuum
  • Testing indicates approximately 3-4 oz of oil in sump, with an additional 3-4 oz draining upon dipstick removal
• Testing Note: Test procedure valid only for a sealed engine without external venting (e.g., through dipstick or trans top cover)
• Compatibility: Can be used with external venting (via dipstick, trans cover, air cleaner)
• Warranty: 1-year standard, with an optional additional year upon completing warranty form on website
• Origin: Made in the USA
• Application: Stock replacement for Milwaukee Eight engines in Touring and Softail models
• Additional Note: Rocker Cover Gaskets are sold separately
• OEM Comparison:
  • Factory plastic OEM breathers prone to distortion and sealing issues, especially under excessive heat
  • Common problems include struggles in umbrella valve sealing and cracked/broken exit nipples due to heat distortion or poor installation.

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