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S&S Steel Breather Gear Kit For Harley Big Twin 1948-E1977
  • S&S Steel Breather Gear Kit For Harley Big Twin 1948-E1977

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Video Reviews (2)

S&S Steel Breather Gear Kit For Harley Big Twin 1948-E1977 Videos

S&S Steel Breather Gear For Harley Big Twin

S&S offers their steel breather kit as an upgrade to your standard breather gear. Consider this gear especially if you have a factory nylon gear in your engine - the nylon can readily accept shavings and carbon particles, turning itself into a giant abrasive wheel. Thoughtfully, S&S also offers this part in an .030" oversize version for those who have scored cases from their nylon breathers. If that's the predicament you find yourself in, you can have your machinist open up the breather bore, install the steel breather gear, and put your engine cases back into service!


  • Kit comes with gear and spacer
  • Available in standard or +.030" oversize
  • Requires the use of corresponding cam and pinion gear
  • Made in the USA

Fitment Notes & Exceptions

  • These parts require a good deal of technical skill to install correctly - it is the responsibility of the person assembling the parts to check all clearances and assembly specifications
  • Item is for case-breathing engines only - please verify before ordering
This Product Fits:
Harley Davidson
E 1948, 1949, 1950
F 1948, 1949, 1950
FL 19481965
FLF 19531964
FLFB 1965, 1966, 1967, 1968, 1969
FLH 19551976
FLHB 1965, 1966, 1967, 1968, 1969
FLHF 19551964, 19701972
FLHFB 1965, 1966, 1967, 1968, 1969
Servi-Car (G) 45ci 19481973
Super Glide FX 19711976
Super Glide FXE 1974, 1975, 1976
U 1948
UL 1948
WL 1950, 1951
Product Style RevZilla Item # Manufacturer Product # Availability
Standard 958885 33-4253 In Stock: Ships next business day
+.030" Oversize 986638 33-4263 In Stock: Ships next business day


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S&S Steel Breather Gear Kit For Harley Big Twin 1948-E1977
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