As low as $43.63/mo with or . (Pay in 4 interest-free payments)
S&S CYCLE Crankcase Breather Reed Valve (Standard) Keep your Evolution Big Twin running clean and consistent with the S&S CYCLE Crankcase Breather Reed Valve (“93-’99). Designed for street performance, this new-style breather reed valve opens and closes on demand —helping manage crankcase air pressure and reduce high-rpm oil carryover. Key Features Pressure-controlled operation : Reeds open when crankcase pressure exceeds cam chest pressure, and close when cam chest pressure is equal to or greater than crankcase pressure. Automatic compensation for air-flow lag during acceleration to support stronger performance . Cleaner breathing : Helps stop high-rpm oil carryover in engines with marginal piston ring seal. Fast, simple installation : No aligning timing marks and no rotating parts . Made in the USA by S&S CYCLE. Specifications Type : Crankcase Breather Reed Valve Fitment : Evolution Big Twin – ’93-’99 Thread Size : Standard Finish/Color : Silver Units : Each Weight : 0.21 lbs Dimensions : 3.93" x 3.85" x 1.33"
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 time associated with accelerating the mass of air as it is forced out of the crankcase, increasing performance and stopping high-rpm oil carryover in engines with marginal piston ring seal
Installation is fast and simple; no aligning timing marks, and no rotating parts
or 
. (Pay in 4 interest-free payments)
