Breather Reed Valves - Crankcase - +0.030" Oversize - Evolution Big Twin '93-'99 Eastcoastin Parts Mega Power Exhaust - Chrome

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Breather Reed Valves - Crankcase - +0.030" Oversize - Evolution Big Twin '93-'99 Eastcoastin Parts Mega Power Exhaust - ChromeBreather Reed Valves Crankcase +0. 030" Oversize Evolution Big Twin '93 '99 New style breather is not dependent on the rotation of the crankshaft to make it open and close. Instead, reeds open when pressure in the crankcase becomes greater than pressure in the cam chest, and close when pressure in the cam chest is equal to or greater than pressure in the crankcase By opening and closing "on demand," the reed valves automatically compensate for lag