Shovelhead Cylinders OEM (3-1/2″) Bore, Black Coated


Shovelhead Cylinders 3-1/2″ (OEM) Bore, Billet Aluminum (black anodized).


Shovelhead Cylinders OEM (3-1/2″) Bore Billet Aluminum by Speed And Science.

  • Billet Aluminum outer shell has been Black Anodized (Heat- and UV-resistant coating!!)
  • Suitable for all ’66-’84 models, this product does NOT require engine cases to be bored out in order to accept the cylinder spigots.
  • Shovelhead Cylinders OEM bore are supplied 5.330″ (OEM) long and accept up to 4-1/4″ stroke crankshafts. Longer stroke requires using stroker plates (not supplied). Shorter strokes require base trimming.
  • Comes with pressed-in, cetrifugally spun Grey Iron liners, undersized by -.030″ to allow for bore / hone to fit customer’s pistons. Liner’s wall thickness allow for all available oversized pistons.
  • Liners are replaceable, making the product infinitely rebuildable.
  • Internal, “hidden” oil drains, OEM locations top / bottom.
  • 9.2lb weight savings (p. pair) versus the all cast-iron construction.
  • Much better heat conductivity / dissipation drops the operating temperature up to 50F.
  • Warranty details and conditions are listed in the Installation Manuals ( Manuals download page )
  • ***Please allow up to 10 business days for the Anodizing***

Additional information

Weight17 lbs
Dimensions18 × 12 × 10 in


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