33-4247 Steel breather valve. +.030" OD

When you are dealing with a worn or damaged crankcase on a 1948 to early 1977 Big Twin, this +.030-inch oversize steel breather valve from S&S is the professional solution. By reaming the damaged breather hole with a specialized tool, you can use this oversize valve to restore proper timing and vacuum function to your engine's breathing system. Like all S&S breather valves, it features elongated holes to improve oil scavenging from the top end. This valve is made from high-quality steel for long-term durability. Remember that steel breathers require the use of steel breather valve spacers to ensure proper clearance and operation. It is an essential part for saving vintage cases and ensuring high-performance reliability.