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OTB Gear Crankcase Breathers

5.0 out of 5 stars 2 Customer Reviews

Replace your ugly mechanical fuel pump with OTB Gear crankcase breathers. Installed on your flathead engine intake, these one-way check valves allow high pressure to escape your engine crankcase, while preventing grit from being sucked in. Constructed from aircraft-grade aluminum with the baffles built into the tube, they are precision-machined to exacting standards. They include a gasket, but not the bolts. Their low profile prevents clearance issues. They're available in your choice of show-quality polish or unpolished.