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Instead of going that route and emulating the real deal
281) diameter hole before tapping
9" wide driver area
Permits control of many aspects of your motorcycle's tune
2014-18 require O2 reducer bungs)
TC Bros. Breather Bolts for Harley-Davidson Sportster 1991-2022 and Evo Big Twin 1993-1999 Color:Black Anodized Instead of going that routeTC Bros. Breather Bolts for Harley Davidson Sportster 1991 2022 and Evo Big Twin 1993 1999 Stock airboxes on late Evolution powered Sportsters and Big Twins integrate a provision for crankcase breathing through the cylinder heads. Eliminating the airbox to run an aftermarket air cleaner also eliminates the hollow breathing bolts. Fits Evo with head breather (Sportster 1991 2022, Big Twin 1993 1999 exc. Twin Cam) Available in Raw Machined or Black
US$ 20.95
US$ 171.00
US$ 40.00