Mopar Performance 3/8" Valve Stem Seals P4120492 – Genuine OEM For Small & Big Block Engines

If you’re building a Mopar engine, don’t skimp on the little things.

These are the real deal: genuine Mopar Performance valve stem seals.

They’re brand new, direct from the factory, and designed to fit both small and big block engines with 3/8” valve stems.

The part number is P4120492, and they’re made in the USA.

These are OEM spec, so you’re getting the exact same quality that Chrysler intended.

Just a quick note: they come in standard manufacturer packaging, which might just be a plain box.

Also, there’s a Prop 65 warning for California, but that’s pretty standard for automotive parts.

These seals don’t carry a separate warranty, but being genuine Mopar, you know they’re built right.

Perfect for a rebuild or performance upgrade where you want that factory fit and reliability.