The Washer(6a1) is the lowest priced item on this Intake schematic.
With all the components that make up the C150TRX 1999 INTAKE assembly. The Bolt(6n6) is the most frequently specified with sixteen applications.
A sample from the products for the Intake include: Hose (l1160), Washer, Plain (646), Pipe, Joint, Washer, Plain (646).