Donovan 417 Hemi

While the Original 392 Aluminum Hemi Replacement Block Remains a
Drag Racing Cornerstone...

...there's a NEW Billet in town.

Donovan Engineering's NEW
Billet 417 Hemi


With over 5 MILLION lines of code, Donovan Engineering is proud to announce the Billet 417 Hemi.

This block blends decades of manufacturing experience with Mastercam's CAD/CAM technology.

The result is the Ultimate 417 Hemi aluminum engine block.


Be sure to watch this Block's Video !


For racers who want the original 417 Donovan cast block, Donovan Engineering provides these original 417 cast hipped solid aluminum blocks.

Donovan Engineering Standard 417 Hemi

  • A356-T6 Aluminum
  • Ductile Iron Sleeves
  • 9/16" Head Studs
  • Super-Finish Lifter Bores
  • Sleeves Available Straight or Siamese - 4" bore
  • Accepts Most 392 Parts
  • Gear Drive Available for Blown Engines
  • Solid Construction for Rigidity
  • 20 -1/2" Main Studs
  • 18 - 3/8" Girdle Rail Studs
  • 4340 Aircraft Quality Steel Studs, Nuts, and Washers
  • Hardened and Ground Locating Dowels (Girdle)
Donovan Engineering 417 Girdle
  • Custom Built One-Piece Stainless Steel Valves
  • Intake and Exhaust - All Sizes
  • The Ultimate in One-Piece Valve Engineering
  • Proven in Drag Racing Year After Year
  • Original Circa 1962 Valve Covers (New Re-Issue)
  • 356 T-6 Aluminum
  • Relief Notches for Larger Springs, Rockers & Stands
  • Wide Bottom Flange for Sealing
  • Spark Plug Tubes Available
  • Three Breather Styles Available

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Donovan Engineering Corp. | 2305 Border Ave., Torrance, CA 90501-3614 USA | +1 (310) 320-3772 Voice, +1 (310) 320-1090 FAX

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