Mr. Gasket
Performance Valve Cover Gaskets Fits 1959-1980 Chrysler 383-440 Big Block B/RB Mr Gasket
SKU: M00S 378
Description
Part #: 378
Mr. Gasket Performance Valve Cover Gaskets are high-density cork/rubber blend Gaskets that use evenly sized cork particles distributed evenly throughout the rubber binder. The result is a compressible valve cover Gasket without leak paths.These Gaskets create a positive seal by controlled swelling of the Gasket material when exposed to hot engine oil. Provides excellent flange sealing and durability.For original equipment replacement, high performance street, drag race and oval track use.Manufactured from high-density cork/rubber blend Gasket materialProvides excellent sealing and durabilityFor OE replacement, high performance street, drag race and oval track useDetails:Engine: Big Block MoparColor: BrownEmission Code: 5Valve Cover Gasket Material: PerformanceValve Cover Gasket Thickness: 0.187Warranty: Manufacturer's Limited 90 Day Warranty
Features:
- Manufactured from high-density cork/rubber blend gasket material
- Provides excellent sealing and durability
- For OE replacement, high performance street, drag race and oval track use
Valve Cover Gasket - 0.187 in Thick - Cork / Rubber - Mopar B / RB-Series - Pair
Fitment
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Specifications
| Brand | Mr. Gasket |
| Part Number | M00S 378 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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