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Each hidden breather is O-ringed at the heads and exits inside the mouth of the throttle body for a virtually closed loop system
OEM numbers: 74700021 7470021
Both pullback and straight riser options have top clamps angled at 35°
Vendor Part Number: 1213-0017-P
BIG SUCKER STAGE 1 - FLT 17-23 - CHROME BASE - OEM COVER Helmet Each hidden breather is O-ringedEach hidden breather is o ringed at the heads, passes through the backing plate and exits inside the mouth of the throttle body through the proprietary breather tubes Hidden Breather backing plate technology is a step up from original system Aluminum filter top plate has integrated filter mounting studs and directional air venturi for increased durability and performance Filter offers over 200% more surface area than the factory filter and features a