Heavy Duty Inner Primary Bearing Race. Fits 5Spd Big Twin 1991-2006 & After Market 6 Speed Transmissions Main Shaft. - S&S Windshields & Luggage * Rounded thread roots

* Rounded thread roots

oil quenched and tempered to 39-44 HRC

* Accepts Most Stock or Aftermarket Hand Controls

509″ Gauge

course thread # B-HN101

Heavy Duty Inner Primary Bearing Race. Fits 5Spd Big Twin 1991-2006 & After Market 6 Speed Transmissions Main Shaft. - S&S Windshields & Luggage * Rounded thread rootsFeatures & Benefits: * Fits all H D 1991 2006 with 5 Speed Transmission. * S&S inner primary bearing race positively eliminates bearing race movement that can cause costly damage to transmission seal & output bearing. * A must for high performance applications. Tech Tips: * Will Not Fit OEM 6 Speed Tranmissions. (Will Not Fit Dyna 2006) Proudly Made in the USA by S&S Cycle !