Chrysler Early Hemi Valve Covers – 331, 354, 392 (10-Fin Cast Aluminum)

Chrysler Early Hemi Valve Covers – 331, 354, 392 (10-Fin)

Bring authentic period styling to your Early Chrysler Hemi with these 10-fin cast aluminum valve covers, patterned from the original Mickey Thompson “THOMPSON” design — later known as the “PARKER.”

Designed specifically for 331, 354, and 392 Chrysler Hemi engines, these finned valve covers deliver the unmistakable look that defined early drag racing and gasser-era performance builds.

Manufactured in the USA from 356 heat-treated aluminum, each cover features a fully machined gasket sealing surface and CNC-profiled flange perimeter for proper sealing and precise fitment.

This isn’t a modern reinterpretation — it’s true-to-era speed equipment for builders who care about authenticity.

Fitment

• Chrysler Early Hemi engines:
  • 331 Hemi
  • 354 Hemi
  • 392 Hemi
• Designed to accept 426 Hemi 6-5/16" long spark plug tubes
• Inside height: 3.650"
  • Clears OEM adjustable rockers
  • Clears most billet rocker assemblies and stands
  • Compatible with long valves using beehive springs

Key Features

• Shot-peened matte finish (polishing optional)
• Fully machined gasket sealing surface
• CNC profiled flange perimeter
• Machined for 3/32" Buna-N O-rings for leak-free plug tube seal
• 356 heat-treated cast aluminum
• Weight: 7.5 lbs each
  
• Sold as a matched pair

What’s Included

• (2) Valve covers
• (8) 3/32" Buna-N O-rings

Finish Options

• Polishing available (adds additional lead time)

Manufactured in the USA

These Early Hemi finned valve covers are ideal for nostalgia drag racing builds, traditional hot rods, vintage gassers, and period-correct Chrysler restorations. Designed for 331, 354, and 392 engines, they provide authentic 1960s styling while offering modern machining precision.

Frequently Asked Questions

Do these fit 426 Street Hemi engines?
No. These are designed for Early Chrysler Hemi engines (331, 354, 392).

Are plug tubes included?
No. The covers are designed to accept 426 Hemi 6-5/16" long plug tubes. O-rings are included.

Will these clear aftermarket rocker setups?
With an inside height of 3.650", they clear OEM adjustable rockers and most billet rocker assemblies and stands. Always verify your specific valvetrain dimensions.

Are these billet or cast?
These valve covers are cast from 356 heat-treated aluminum for authentic period texture and strength.

Are they sold individually?
No. They are sold as a matched pair.